How To Grow Autoflower Weed Seeds

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Wondering how to grow autoflowering marijuana strains or looking where to buy it? In this guide, we explain all you need to know. What are the biggest mistakes you can make when growing autoflowering cannabis? Read the basics and find out how to take care of your strain's buds. Learn how to grow autoflowering weed with our week by week autoflower grow guide. Plus bonus tips on growing autoflowers indoors or outdoors!

Growing Autoflowering Cannabis Seeds [Guide]

Do you desperately want a cannabis garden but don’t have the time to dedicate? If so, autoflowering seeds are potentially the answer to your prayers! These unique strains flower automatically rather than waiting for a specific lighting cycle. Generally speaking, your plants will begin flowering after a vegetative stage of just 2-4 weeks.

The autoflowering phenomenon has only gained traction in recent years. Strains of this nature include Cannabis ruderalis genetics, a species of marijuana first described by D. E. Janischewsky, a Russian botanist, in 1924. When you cross ruderalis genetics with indica or sativa varieties, you get plants that grow and flower without intervention.

This guide outlines everything you need to know about autoflowering cannabis seeds. This includes tips on growing them, pros and cons, and five of the best strains on the market.

EDITOR’S CHOICE – Homegrown CannabisCo

Homegrown CannabisCo are the masters when it comes to seeds. Offering a massive variety of cannabis seeds that are well categorized, not only does this company create a resource for superb quality options including feminized seeds, it also provides extensive growing information for those looking for some support along their journey.

Autoflowering Cannabis: What Is It?

With regular ‘photoperiod’ marijuana plants, an outdoor grower must rely on the seasons. Meanwhile, an indoor grower must change their lighting cycle. For instance, to force your plants to enter the flowering stage, you need to create a 12/12 light cycle. The change in light duration lets the plants think winter is coming, and it starts flowering accordingly.

As the name suggests, autoflowering marijuana strains flower automatically rather than waiting for a specific light cycle. These plants produce buds when they are ready, which means there is no reason to mess with your lighting.

While the yield and potency of photoperiod weed remain higher, the gap is closing. As breeding techniques become more advanced, it is now possible to produce autoflowering marijuana strains with significantly increased levels of THC. They also produce far bigger yields.

For example, strains such as Amnesia Haze Automatic produce up to 14 ounces of bud per square meter planted. Royal Gorilla Automatic contains up to 20% THC. With fewer disadvantages than ever before, it is no wonder that ‘auto’ plants are becoming increasingly popular.

It takes as little as eight weeks from seed to harvest. Therefore, you can enjoy several batches of autoflowering plants each year. While they were traditionally small and squat, even that aspect is changing. Auto Sweet Soma seeds can produce plants that grow as high as 155cm, for example! You can still get small plants such as Royal Jack Automatic that seldom grows taller than 80cm if you wish.

Your Exclusive Autoflower Grow Guide

When using auto-flowering cannabis seeds, make sure your plants have as much support as possible throughout the process. Ideally, you will begin your autoflower grow indoors with artificial lights you can control. This tactic reduces the likelihood of error and increases the possibility of a strong start.

Autoflowering Marijuana Seeds

Proper germination is pivotal to the healthy development of your autoflower marijuana plants. You can go down the traditional route of using soil or try a container with a growing medium. The paper towel method is probably the easiest way to germinate your autoflower seeds.

After your seeds begin to sprout, the next step involves transplanting them. Ideally, you will only do so once because autoflowering seeds are susceptible to transplanting shock.

Transplanting auto-flowering seeds is more complicated than their photoperiod brethren. However, it is a myth to suggest it is impossible to do so more than once successfully. You can re-pot an autoflower if you are extremely careful. If you need to transplant your autos to a larger pot, make sure they end up in the same soilless growing medium or soil as before. Also, complete the process before their dark period when their growing medium is dry.

Avoid Early Cuttings with Autoflowering Marijuana Strains

We don’t recommend taking cuttings during the early growth stages of auto-flowering weed. The plant will autoflower at a specific point. Therefore, the age of the cutting will merge with the age of the parent plant. This means they will flower at the same time. If you grow a cutting of an auto-flowering plant, the final version is significantly smaller than the parent when it reaches the flowering stage.

Training Your Autoflowering Weed

It is best to complete the training process during the vegetative stage. It is essential to act fast because this stage is only a couple of weeks long in autos. We recommend using a low-stress training (LST) method, such as pulling the plants down sideways to help boost upwards growth. When they start flowering, prune them for up to a week into the flowering stage and do NOT top them.

You shouldn’t prune an auto-flowering plant in the same way as its traditional counterpart. First and foremost, all pruning should begin early in the life cycle, or else you risk hindering its growth.

Best Lighting & Climate for Autoflowering Marijuana Plants

With autos, you are allowing plants to flower when they should be in the vegetative growth stage. This means you can autoflower rather late in the season (September) or very early (March). Please note that the plants can only grow with adequate warmth. Exposure to excessive levels of moisture could result in rot.

We recommend growing autoflowering plants indoors if possible. Ideally, your plants will grow in a room with a temperature of 68-77 degrees Fahrenheit with 50-70% humidity.

Plants with ruderalis genetics are tougher than those without but still require light to produce food for themselves. Many autoflower growers still believe that providing light 24/7 is best for their plants. This process enables them to absorb CO2 during the photosynthesis process continually. Ruderalis plants grew for a long time in the northern hemisphere. In that situation, they were exposed to 24 hours of light a day on occasion.

24-hour lighting will result in fast initial growth. However, it usually slows down after a few weeks because the plant is without adequate rest. The 18/6 schedule offers a delicate balance of plenty of light with ample rest. You also save money on your energy bill! For instance, in one month, using an 18/6 schedule against a 24/0 schedule saves you 180 hours’ worth of light!

The 20/4 schedule is potentially a happy medium. However, the 18/6 option is the most sensible because your plants need a few hours of darkness each day for specific metabolic processes. Whatever additional yield you attain from constant lighting is more than offset by the increase in your lighting bill!

Feeding Your Autoflowering Plants

The latest generation of auto-flowering plants are more prominent than their predecessors and produce a bigger yield. As a result, they need more nutrients than their first-gen counterparts. Even so, on average, an auto-flowering plant still requires fewer nutrients than photoperiod plants. Make sure you water them for the first two weeks as they begin to grow.

There is no need to add nutrients during this period. By week three, you can begin adding nutrients and increase the feeding rate weekly. Remember, the vegetative stage is short, so you need less nitrogen. Light feeding is ideal unless you notice a nutrient deficiency. You’ll need to alter the nutrients once the plant hits the flowering stage.

Harvesting Autoflowering Marijuana Plants

The best method of harvesting auto-flowering plants is to take the colas and allow the lower buds to become denser before harvest. As these plants grow so quickly, they usually don’t have time to develop a canopy. As a result, you need to keep the buds that are lower down on the plant. These days, it isn’t unusual to find automatics that produce up to 22 ounces per square meter.

Since you can grow 4-5 batches a year, it adds up to a lot of buds! We also recommend preparing the next crop as you are harvesting. Pop seeds before you collect your existing plants to ensure your garden is continually producing. The fact is, you don’t need to worry about changing lighting because your plants automatically flower!

Curing & Storing Autoflower Weed Strains

Many of the same drying, curing, and storing rules apply with auto-flowering cannabis plants. You can dry your buds by hanging them upside down for a few days. Store them in airtight containers but ensure there is a bit of space in each jar. Initially, open the jars once a day for a few minutes.

After a week, opening the jars once every 2-3 days will suffice. Your bud is ready for use once there is only a small amount of moisture left. Transport your weed to a sealed container and use it within a few months.

Where to Find Autoflowering Cannabis Seeds

It is relatively easy to buy autoflowering seeds online. There is an increasing number of reputable websites that sell them. Alternatively, you can find them in a local dispensary, but purchasing the best autoflower seeds is a challenge at first.

When making the decision, ask yourself the following questions:

  • What level of THCand CBD are you looking for?
  • Do you have a preferred taste and aroma?
  • What kind of growing conditions will you plant the seeds in?

It is also crucial to purchase feminized seeds. Otherwise, around half of your crop will consist of male plants, which could ruin everything. If you have a small grow room, purchase an indica strain because they usually grow smaller. If you have a larger space, buy sativa autoflower strains. They are typically bigger and provide a higher yield.

Now, let’s take a look at five autoflowering strains worth considering for your cannabis garden.

Five Awesome Autoflowering Strains

1 – Amnesia Haze Auto

Amnesia Haze Automatic combines 30% ruderalis, 20% indica, and 50% sativa genetics. It is a nice option if you want a sativa-dominant strain that doesn’t take forever to flower. By the standards of autoflowering strains, it is a large plant that can reach 120cm in height.

What interests growers is the fact that it can grow from seed to harvest in just ten weeks! In the past, autoflowering strains were fairly weak, but Amnesia Haze Automatic contains up to 18% THC. Its yield is up to 14 ounces per square meter planted, which isn’t a million miles behind many photoperiod strains.

Apparently, it is a crossbreed between The Bomb, Ultra Haze, Champagne Haze, and a few other popular strains. Users claim that it offers a nice sweet and spicy taste. Also, it offers an uplifting cerebral high that can be used to manage the symptoms of depression and perhaps boost your appetite.

It’s easier than you think!…

2 – White Widow Auto

This autoflowering option is a new cross of White Widow, which is widely regarded as one of the finest strains around. It looks just like its photoperiod counterpart with wide dark green leaves and glistening trichomes. While it has many traits that made its traditional version so popular, the auto version has a total crop time of under 85 days!

The buds provide users with an indica effect, and its woody, intense aroma and taste combine beautifully with a hint of lemon. White Widow Automatic has been bred for several years to ensure genetic stability. The plant can grow to 100cm, although it is more likely to hit 50cm. The overall yield is up to 9 ounces per square meter, although some growers claim they have attained a yield of 16 ounces.

White Widow Automatic is potent, with a THC content of 15-20%, and is often used to help with pain, insomnia, stress, and nausea. For best results, grow it under 24/7 light as much as you can. It is 20% ruderalis, 40% indica, and 40% sativa.

3 – Quick One Auto

Quick One Auto’s creators didn’t take too long to decide the name of this autoflowering strain! It was one of the first members of the Royal Queen Seeds collection and is a cross of Northern Lights, Ruderalis, and The Williams Wonder. It contains 30% ruderalis, 60% indica, and 10% sativa genetics.

When Quick One was released, it was among the fastest-growing strains ever. While there are even quicker growing autos these days, Quick One is still lightning with a total grow time of around 8-9 weeks. However, you may want to give it an extra week for a more mature final plant.

Its yield can reach a decent 12 ounces per meter square indoors but is just 6-7 ounces outdoors. It offers a fresh, herbal aroma with a pleasant taste that has citrus notes. Quick One won’t grow much taller than 50cm, making it ideal if you’re stuck for space. Its THC content of 13% is low by today’s standards, but it is still a good smoke for novices.

4 – Easy Bud Auto

Easy Bud Auto isn’t a household name, which is a great shame. As you can probably guess, it is among the easiest autoflowering strains to grow. Therefore, beginners should be casting their eyes toward it. It is a durable plant, and there are few growing conditions where it won’t provide at least a few grams of high-quality buds.

It was created by breeding an indica-dominant hybrid (possibly White Indica) with an unknown ruderalis plant. It has 30% ruderalis, 55% indica, and 15% sativa genetics. Royal Queen Seeds created it, and its total growing time is 8-9 weeks, whether you grow it indoors or outdoors.

Its height ranges from 40-70cm and works best when using organic nutrients and soil as your growing medium. It doesn’t require many nutrients and thrives under most light sources. It can provide up to four ounces of bud in optimal growing conditions. With a THC content of 12%, it won’t provide a devastatingly potent high, but it is an easygoing smoke that offers decent body intoxication.

Easy by name, easy by nature!…

5 – Royal Jack Auto

This autoflowering strain is a cross of Jack Herer and a Ruderalis plant. It is named after the legendary activist who wrote The Emperor Wears No Clothes. The strain’s genetic makeup is 30% Ruderalis, 30% Indica, and 40% Sativa. With a total growing time of around nine weeks, you could benefit from several harvests per year if you are motivated.

Royal Jack Auto shouldn’t grow any taller than 80cm, and its yield is around 4-5 ounces per plant. Overall, with a THC content of around 16%, this autoflowering option provides you with a relatively potent, Sativa-dominant high that could boost your level of creativity. Users are also rewarded with a fresh and peppery scent from what is a very satisfying smoke.

The Pros and Cons of Growing Autoflowering Cannabis Seeds

By now, it probably seems like a no-brainer to grow auto-flowering marijuana any chance you get. However, some disadvantages come along with the host of benefits that autoflower strains provide. Here is a brief list of the pros and cons of autoflower marijuana vs. regular marijuana.

Pros of Autoflower Marijuana Strains

Greater Variety

The shorter growing season means you have a higher level of autoflowering varieties. Imagine having the opportunity to grow five different strains in a single season! Multiple harvests are especially useful if you enjoy the growing process and are keen to sample as many marijuana types as possible.

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Uncomplicated Setup

If you grow marijuana the traditional way, you’ll typically require a specific grow room and a separate flowering room. With autoflowering weed, you only need a single space. If you have several rooms, you can time your growing to guarantee a harvest every few weeks.

If you grow in a typical manner, you have to ensure your grow room has light-proof sealing. It is a disaster if this gets breached. In contrast, a light leakage has no discernible impact on the flowering stage of your autoflower marijuana.

Durability

As autos contain ruderalis genes, they are more robust than other marijuana plants. Remember, they are based on plants that could grow in harsh Russian weather conditions. A typical cannabis plant will have its flowering and growth phases interrupted if there is a power outage. This fact could play havoc with their growth cycle. You don’t have this problem with an autoflowering plant.

Fast Blooming

There are auto strains with a flowering time of just five weeks! Add in a 2-4-week vegetative stage, and you could theoretically grow a strain from seed to harvest in only seven weeks. Bubble Kush Auto, for example, is ready to collect 7-8 weeks after sprouting. Therefore, you can enjoy multiple harvests each year.

Stealth Growing

While varieties of autoflowering strains are getting bigger, you can still find versions that grow to about 40-50cm. Consequently, you can plant them in a closet, tent, or even on a balcony! You could also hide such a plant in a remote field if the grass is tall enough! Also, autos don’t require a ‘support system’ to hold up long branches that could bend or break as the buds get larger.

No Messing About with Lighting

There is no need to change your light cycle to a 12-12 schedule. Therefore, you can keep a consistent lighting schedule all year round if you wish. With this possibility in mind, you can grow auto-flowering plants at different stages in the same room!

9 Mistakes To Avoid When Growing Autoflowering Cannabis

Autoflowers are too easy to grow if you avoid these 9 common mistakes. Find out if you’re growing autoflowering cannabis plants the right way in this article.

  • 1. Knowing the basics
  • 2. Time it right
  • 3. Germination
  • 4. Choose the right medium
  • 5. Choose good containers
  • 6. Do not transplant
  • 7. Over and under-watering
  • 8. Overfeeding and underfeeding
  • 8. a. Macro and micronutrients
  • 8. b. Ph levels
  • 9. Harvest at the right time
  • 10. Frequently asked questions about autoflowers
  • 11. In conclusion

Autoflower cannabis has always sparked debates among growers in the cannabis community. Due to a dearth of knowledge or experience, many growers avoid growing autoflowers. Beginners are expected to only grow photoperiod plants, and while the fear of something new and unexpected is understandable, you might discover something more amazing if you just try. Autoflowers are really easy to grow but there are basic guidelines you should know, just like when growing other plants or vegetables. All plants are different and even though you can successfully harvest the first time you grow cannabis, there are common mistakes that are better to avoid. If you’re new to autoflower growing and are looking for an autoflower grow guide or want to know how to grow autoflowering strains, here are a couple of tips to have you growing in no time.

1. Knowing the basics

To set things straight, let’s begin by saying that autoflowers are really easy to grow. In fact, beginners can try growing autoflowers with little to no experience as long as they understand the basics 1 . And this is true for all plants. Can you expect to grow tomatoes if you’re clueless about using nutrients? Or, can you harvest cucumbers if you don’t even know when to harvest them? No? Similarly, autoflowers need you to follow a few basic guidelines like other plants, and you’ll do just fine if you take the time to understand them.

But what makes autoflowering cannabis cultivars so easy to grow? Well, there are a few beginner-friendly traits that set them apart from their photoperiod cousins. For one, they descend from a type of cannabis—known as cannabis ruderalis—that adapted to the harsh conditions of Siberia. All autos possess Ruderalis genetics, which endows them with impressive hardiness, good pest and disease resistance, and rapid growing times. If you’re an indoor grower, you won’t even need to adjust the light cycle to get them to flower. Now that you’re more familiar with autoflowering genetics, let’s take a look at what mistakes to avoid to achieve the best outcome possible.

After all, a plant that gives you lip-smacking buds in just 2 months deserves some research, eh? Autoflowers may scare you at first, but if you avoid a few common mistakes, you’ll harvest much more than you can imagine, and it only gets better.

2. Time it right

Timing is everything if you’re planning to grow autoflowers outdoors. Since autoflowers don’t depend on light to flower, you don’t need to worry too much. But, planting too early will generate smaller yields and planting too late affects yields too.

Frost must be avoided at all costs. Typically, most growers begin planting when spring is just around the corner. Depending on where you live, you can plant the seeds as soon as the frost clears. If you reside in a location that doesn’t receive any snow, go ahead and plant when the temperatures range between 22°C to 28°C (71°F to 77°F).

If you live in a particularly cold region, there are steps you can take to protect your plants from the threat of late frosts. Of course, starting seeds indoors will help here. Plus, doing so will help to speed up germination times. Moving them out into greenhouses and polytunnels will add an additional layer of protection as the seasonal frosts begin to wane. If you have no choice but to move them outdoors under the sky, consider covering young plants with bell cloches and mulching the surrounding soil with hay or straw as a form of insulation.

You can also leverage timing to take advantage of successive harvests. Staggering sowings by two weeks till break up the work that awaits come harvest time. It will help you space out all of that trimming, drying, and curing into easily manageable portions. Bigger plants can tolerate much higher temperatures but tender seedlings will succumb to extreme temperatures. Remember to avoid rainy seasons since the plant doesn’t receive too much light. Of course, the timing doesn’t matter if growing indoors, so sow those seeds whenever you wish!

3. Germination

For beginners, germinating the seeds is an important part of the entire process. To get better results, soak the seeds in plain water for at least 24 hours and wrap them in moist paper towels for a day or two. Use a ziplock bag to store the towels.

By soaking your seeds up to 48hrs and then keeping them in a moist paper towel you guarantee successful germination.

It’s important to keep the towels moist because the seeds can rot if there’s too much water. Similarly, the seeds won’t sprout if the towels are completely dry. Don’t make the mistake of directly planting the seeds, especially if you’re doing it for the first time. Once the seeds show a tap root, plant the seeds in the final container. Despite having to keep the seeds in damp paper towels, make sure they are not completely wet, too much water can rot the seeds. The best way to identify this is by smell if the paper towels start to smell like mold, immediately take them out and change the towels.

Sebastian Good gives you all the essential information about germination of autoflowering cannabis seeds.

Depending on your experience, you can also germinate your seeds directly in the medium, just make sure you’re not overwatering it because you can end up drowning your seeds. As you can see in the video, germinating in the soil is easy and doesn’t require anything extra, just be careful and you’ll see a seedling coming out of the ground in a couple of days.

4. Choose the right medium

Growing plants in hydroponic setups seem very cool, but soil is your best bet if you have no experience. Avoid using clay soils that clump up because autoflowers thrive in well-aerated soil. A soilless medium of equal parts of peat moss or coco peat, perlite, some airy soil, and sand is the best potting mix for autoflowers. If you don’t want to bother about fertilizing at all, you can even try growing autoflowers organically. There are various ways to make your own organic soil, but you can buy some in your local store to start with. Organic soil is premised with nutrients, so it’s ideal for someone that doesn’t have a lot of time. For growers that don’t mind putting in the efforts, composting and building super soil is the best soil mix for autoflowers.

There are a variety of different techniques to create healthy compost loaded with organic matter and beneficial microorganisms. If you can get your hands on enough green (grass cuttings, food scraps, coffee grounds, manure) and brown materials (cardboard, paper, woodchips) to fill a compost bin immediately, you can create a hot compost pile that will produce an excellent growing medium in as little as a few weeks. Simply add 50% green material and 50% brown material, stack them in alternating layers, and turn and water occasionally.

If growing outdoors, till the soil well and amend it with organic nutrients to produce a happy, healthy plant. But, no matter what you do while growing indoors, stay away from old used soil or sterilize it before you plant seeds to prevent diseases. If you have the luxury of a garden, you can leverage biodiversity in your favor to produce incredible auto specimens. Consider sowing companion plants such as basil, chamomile, and yarrow nearby to attract beneficial insects that will help to keep pest species away. If you live in a hot climate, low-growing ground cover plants such as winter squash will help to cast a shadow over the soil and, in doing so, boost moisture retention and reduce the amount of watering you have to do.

5. Choose good containers

Please don’t stuff seeds in plastic containers that make life hell for the poor roots. Use porous containers such as fabric pots or even Airpots to help the plants grow as much as possible. Autoflowers are typically small, but they need containers that are at least 5-8 liters in size.

Roots also need oxygen, although they need water to absorb nutrients, a lack of oxygen can damage and kill your plants.

Bigger autoflowers need bigger containers, so make sure you check the description before purchasing seeds. Root aeration is often overlooked, but it’s an important factor in determining your yields.

The appropriate pot size can also help you control the height of your cannabis plants, usually, a 12L pot will allow your plant to develop to its maximum, an auto in a 7L pot will grow up to 70cm and in a 3L pot will grow around 40cm.

If you’re growing autos outdoors in a warm climate, your containers will dry out fast—especially during heatwaves. To help improve water retention, consider applying a layer of mulch onto the top of your growing medium. Straw, hay, or leaf litter helps to produce more of a natural growing environment—how much bare soil do you see when walking through the forest? As well as breaking down and feeding soil microbes over time, these materials shield the top layer of soil from the sun and reduce water loss via evaporation.

6. Do not transplant

It’s important to start autoflowers in their final containers rather than planting them in smaller ones and transplanting them later. Sure, growing cannabis is like growing tomatoes, but autoflowers have a limited time period and can’t afford to lose days while the plant settles and searches for roots.

Some growers use small plastic cups to plant seeds. While this method may work with photoperiod plants, it’s not recommended for autoflowers. If you’re already committed the mistake of planting them in small containers, try to transplant the plant only when the soil is moist. If the soil is too wet, the roots tend to break, and if it’s too dry, transplanting becomes a pain. Of course, experienced growers do transplant autoflowers but it’s not really necessary.

7. Over and under-watering

Most plants die if you over or under-water them. Yes, autoflowers need water to grow, but it’s critical to supply it only when the plant needs it. It’s obvious that the timing is important even when the plants need water.

A way to check if the soil is dry is to use your index finger and stick it in the soil, if it comes out moist then the soil is still humid, although by doing this you won’t be able to know if the bottom is still wet so in order to get the timing right, lift the pots and check the weight. A dry pot will be easy to lift whereas container with lots of water will be heavy. The trick is to not let the soil go too dry or too wet, so water the plants only when the pot isn’t too heavy or light.

8. Overfeeding and underfeeding

Nutrients play a big role in growing autoflowering cannabis strains. Autoflowers are compact, so they don’t need loads of nutes in order to survive. In fact, autoflowers grow best when light fertilizers are used. It’s also important to feed the right nutrients at the right time.

Macro and micronutrients

For example, cannabis needs more nitrogen in the vegetative stage. In the pre-flowering stage, nutrients with more phosphorous are preferred, and in the flowering stage needs a lot more potassium than nitrogen or phosphorous. If you’re wondering what the term “N-P-K” printed on fertilizer bags means, it’s nothing but Nitrogen-Phosphorous-Potassium. The plants also need other micronutrients along with calcium and magnesium, so it’s extremely important to get the dosage right.

Don’t make the rookie mistake of using Miracle Grow or any other fertilizer meant to grow vegetables. Autoflowers will grow well even if you do that, but since they have special needs, you might as well stick to nutrients that supply everything. From humic to fulvic acid to enzymes, you can do a lot to make the plants perform to the best of their potential.

Talking about nutrients, some growers try to make their own nutes. While it’s completely okay to do so, you should avoid doing it if you’ve never done that before. Nutrients are expensive and it’s tempting to make your own, but try to attempt that after you’ve gained some experience. Why? Because cannabis plants require a good blend containing all micro and macronutrients in exact concentrations to thrive. It’s not as simple as diluting a random fertilizer and feeding the plants. You not only risk burning the plants, but the yields will suffer drastically since the plants have no time to recover.

PH levels

So, if it’s your first time, stick to commercial nutrients. And, the topic on nutrients is incomplete if you don’t talk about pH. Depending on the medium 2 you choose to grow, the pH must be regulated accordingly. Cannabis plants love acidic soil, so the pH must be maintained between 5.5 to 7 in both soil and hydroponic setups. If the pH drops below 6, the roots will not be able to intake vital nutrients such as magnesium, calcium, and phosphorous. Similarly, if the pH is too alkaline and goes above 7.5, the roots cannot take up micronutrients like copper, manganese, boron, etc. It’s very important to regulate the pH at all times to prevent nutrient deficiencies.

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Here’s a quick table to help you understand pH better:

Nutrient Ideal PH Level for Absorption
Nitrogen 6.0-8.0
Phosphorus 6.5-7.5
Potassium 6-8
Calcium 6.5-8.5
Magnesium 6-8.5

Sometimes, it just so happens that the plant refuses to respond even if you’ve done everything. In such cases, flush the plants with lots of water (at least double or triple the size of the container) to reduce any nutrient or salt buildup so that the plants can breathe again. Flushing is typically done at the end, but it doesn’t hurt the plant even if you do it in between because it reduces buildups to a good extent.

Some growers also flush during the pre-flowering stage, when the plants are transitioning from the vegetative into the flowering stage so they can start feeding from zero, as said above, this won’t hurt your plants but should be done properly.

9. Harvest at the right time

You’ve come all this way, and the end is almost near, so don’t screw this up now! Now you’re probably asking “how to tell if my autoflower is ready for harvest?” Well, after you’ve put in all the hard work, wait for the right time. Growers use microscopes to check the trichomes that usually indicate the right time, but you can harvest when at least 50 to 70 percent of the pistils are amber in color. While judging pistil colors works well for many growers, you can use trichome color as an accurate estimation for harvest time, too.

Have you ever noticed that white frosty layer on the surface of cannabis buds? They might not look like much to the naked eye, but these are tiny mushroom-shaped glands known as trichomes that produce all of the cannabinoids and terpenes that underpin the effects, aroma, and flavor of different strains. Low-cost forms of magnification, such as jewelers’ loupes, offer an up-close and personal view of these little phytochemical factories.

By assessing their color, you can get a good understanding of the maturity of your buds. Clear trichomes indicate that flowers are still too young and lack adequate levels of cannabinoids and terpenes. Aim to harvest when at least 50% of the trichomes you inspect are milky and opaque. If you wait too long, these glands will start to display an amber color, signifying the partial degradation of THC into CBN—a byproduct associated with a more physical and stoning effect.

If you wait too much, the buds tend to produce a couch-lock effect leaning more towards the Indica side while buds harvested too early generate unpleasant psychoactive effects. Also, the main colas ripen faster than the lower portions of the plant. Often referred to as popcorn buds, the lower portions stay small. However, harvesting the main colas and leaving the popcorn buds on the plant for a week more will increase yields dramatically. Be patient, and let Mother Nature do the rest for you! If you avoid these common mistakes when growing autoflowering cannabis, you’ll soon be rewarded with potent resinous buds that will last a long time if stored properly.

10. Frequently Asked Questions About Autoflowers

What’s the average autoflower size and how tall can they get?

Most autoflowers reach a height of around 50-100cm but a plant’s size depends on the genetics and growing conditions. Also, all strains are different so you will find Sativa and Indica-leaning autos; Most Indica hybrid autoflowers will stay around the 80-120cm mark but Sativa-dominant autoflowers can reach up to 175cm tall.

Can I grow my auto on my window sill?

Yes, you can, although it’s not recommended if you want to get the best results possible but if this is the only way you have, make sure your plant gets at least 4-6 hours of direct sunlight a day and that you’re using at least a 10-liter pot.

Do autoflowers grow normal or smaller because of the Ruderalis genes?

The size of an autoflower can be influenced by several factors, genetics being the main one. More modern autoflower breeders breed their genetics to contain as little as Ruderalis genetics as possible, focusing on the more appealing characteristics such as size, structure, potency, and yields.

But when compared to a photoperiod plant, an autoflower has a limited lifespan so things such as stress, damage, or a bad environment can ultimately affect your auto’s height, so it’s ideal to provide optimum grow conditions to get the best results possible.

When is the best time to plant autoflowers outdoors?

This solely depends on your climate, you need to remember that autos prefer dry sunny days so if you’re planning to have just one grow cycle, you can start them 1-2 weeks into Summer, and if you’re planning to have 2 harvests, start the next one right after finishing the first one.

What yield can I expect per autoflowering plant?

The yields depend on genetics, environment, stress, growers skills, and etc.. But in general, you can expect between 50-110 grams per plant.

How long will it take for my auto to start flowering?

In general, autoflowers stay for 4 weeks in the vegetative stage, so about 4 weeks. Then your auto will start developing flowers for 3 weeks, and fattening up the buds for the last 3 weeks.

Most autoflowers take around 10 weeks from seed to harvest but may take longer depending on the phenotype and growing conditions.

This may vary according to the genetics and growing environment, have in mind that it’s just to give you an idea of what to expect, some autoflowers may take less and others take longer.

Yes, you can, although it’s not recommended because it can affect the yields. To prevent shocking your autoflowers and consequently affecting yields, it’s recommended to transplant 7-12 days after germination and if possible, use rooting cubes to prevent damaging the roots.

Can you grow autoflowering cannabis in a greenhouse?

Of course you can, you can grow autoflowers in a greenhouse all year round as long as you keep the inside temperature to a minimum of 15°C and there’s enough ventilation, airflow, and sunlight.

11. In conclusion

Autoflowers (aka self flowering seeds) are suited for beginner growers but it’s crucial you know the basics if you want to have a successful harvest the first time you grow cannabis, although you can learn as you go, it can be disappointing if you waste time and money, and end up with nothing to smoke.

Now that you know the basics and what to avoid, you’re all set up to start your first autoflower indoor grow.

If you’ve never grown cannabis before and are planning on growing our autos, feel free to ask us anything in the comment section below!

Growing autoflowers indoors in soil & outdoors

Autoflower cannabis plants are a new development in the cannabis market, and it has really exploded the last few years – even Google knows it.

Searches for autoflowering marijuana have doubled over the last single year. Why? They’re looking for information on growing autoflowers!

The autoflower grow guide:

People are getting increasingly excited, interested, and curious about it. There is a good reason for all this excitement. This isn’t a typical marijuana trend; it could be a total game-changer.

Why you should grow autoflowers

Autoflowering weed gives growers a much easier time cultivating cannabis at home.

Unlike traditional types of weed, autoflowering cannabis doesn’t require a change in the amount of light exposure on their plants to induce flowering.

Growing autoflowers has the added benefit of faster growth, especially during the vegetative stage.

The average autoflowering weed strain only needs around 10 weeks (or less) to fully mature.

Outside of having a much easier time flowering, autoflowers are also reasonably small plants that can grow snugly in any indoor grow room.

Today’s autoflowers also no longer have the pitfalls of earlier autoflowering weed plants, which suffered from reduced yields and less potency.

Nowadays, on top of competing with standard strains in terms of potency and yield, autoflowers are more resilient to drastic temperature shifts that allow you to grow them all year round.

  • They are smaller.
    • This means they are easier to hide, harder to spot, and are, therefore, a safer choice with a greater variety of grow location options.
    • in comparison to their size, and are even more resistant to pests and insects than other marijuana strains.
    • No matter what the lighting situation is like in your outdoor or indoor grow setup, they follow the growth schedule embedded in their genes. They will flower after a certain amount of time, not after the light begins to change.

    All this opens up a lot of new possibilities for many growers. This article is intended to keep you informed about this development in the marijuana world.

    Download my free Grow Bible to learn more about growing your own autoflowering cannabis plants!

    • Grow with my Quick Start Guide
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    What is autoflowering marijuana?

    There are plenty of different autoflowering marijuana strains, and no two strains are exactly the same.

    Some people think of autoflower marijuana plants as lower quality than more conventional and traditional types of marijuana.

    Others consider it a godsend that makes life significantly easier for us growers.

    Whichever category you fall into, it may be important to learn more about it, and the different options out there.

    So what is an autoflower marijuana plant?

    To fully understand this, it’s best first to know a bit more about marijuana itself.

    Marijuana is a photoperiod plant, which means that its life cycle (specifically the flowering phase) is influenced by changes in the timing of exposure to sunlight.

    Through this logic, growers can manipulate the growth of their indoor plants with ease.

    Young cuttings can be spurred to enter the flowering phase simply by giving them 12 hours of uninterrupted darkness every night for a couple weeks.

    Older plants growing outdoors won’t enter the flowering phase until this same light change affects them through the natural seasonal variations.

    These don’t occur until after the middle of summer.

    Autoflower strains of marijuana flower when the plants are a particular age, rather than flowering in response to changes in light exposure.

    This means that, regardless of the weather and sunlight patterns, they will enter the flowering phase after a certain number of weeks.

    This, understandably, has opened the door for all sorts of new possibilities in the marijuana growing world.

    The addition of autoflower marijuana strains comes from the crossbreeding of ruderalis plants, with a “standard” marijuana plant.

    Because ruderalis plants were not cultivated for their high THC content (given the fact that the THC levels were very low), they were not grown or used by smokers very often at all.

    For this reason, the dominant traits of the first autoflower strain had to include high THC levels from the “standard” marijuana strain half, and the autoflower genetics from the ruderalis half.

    Check this video by Willy Groff of an autoflower in time laps

    The process was difficult, and largely unsuccessful at first.

    For this reason, not too long ago, growers did not readily trust autoflower strains, because of their low yields and low THC levels.

    They ended up being considered a scam, of sorts.

    Things have changed, however.

    The autoflower strains on the market today are just as reliable as any other strain – just be sure to purchase them from a reputable source.

    The THC content will also be as high as it is described in the online information provided about the strain.

    With these traits stabilized, and the number of high-quality strains of autoflowering marijuana increasing all the time, the dawn of the age of autoflower has finally come.

    Autoflower cannabis strains

    Autoflower strains of marijuana generally have a shorter life than other types of marijuana plants.

    Their quick turnaround is part of their appeal for growers who want more than one harvest per season.

    An autoflower strain usually takes around 10 weeks before they are ready to harvest.

    When considering an autoflower harvest, it is important to remember that it will be different from the harvest of other types of marijuana.

    Certain limitations that come with the plant’s not having the time to grow as long and that includes the fact that it will be smaller.

    Consequently, the harvest will be, too. Your yield can only be so high when you grow smaller plants.

    Some of the highest quality autoflower marijuana strains require ten to twelve weeks for full growth and flowering, to achieve the best possible harvest.

    It mostly depends on the strain you grow.

    Be sure to read the information provided for that specific strain, as well as any comments and tips from people who have successfully grown the strain before.

    Best selling autoflower cannabis strains from the ILGM seed bank

    How to grow autoflower weed

    When you grow any kind of marijuana plant, it is crucial to start the growing season, and entire life cycle, rooted in strength.

    With the short life span of autoflower marijuana plants, this is especially important.

    The very beginning is the time to support your plants so they have as much growth as possible.

    If this is not done, you may end up with a harvest that is infinitely more disappointing than the “normal” marijuana harvest failure.

    The room for error is smaller with autoflowers.

    For this reason, it is often recommended that people who want to grow autoflower marijuana plants start growing them indoors, with artificial lights they can control.

    Indoor growing decreases the chance for error and favorably controls each aspect of your plant’s early life.

    A strong start ensures that it will get everything it needs to thrive, both now, and later on.

    Autoflower marijuana seeds

    Properly germinating your marijuana plants is crucial to their healthy development, as well.

    This can be done naturally in soil, or in a container without any growing medium. I always germinate my seeds in water.

    Most autoflower marijuana growers I know actually prefer the paper towel method.

    It simply involves placing a seed within a damp paper towel, or length of toilet paper, and putting it in a container of some sort that will retain moisture and humidity.

    This should cause the seeds to sprout within days.

    After they sprout, they should then be transplanted to their final growing medium.

    After this, do not transplant them again if you can help it as autoflower plants are small and are vulnerable to greater transplanting shock.

    Autoflower weed cuttings

    For now, cuttings are not a great idea with autoflower marijuana plants.

    The problem is that, while you can easily take a cutting successfully, you have to remember that the plants will autoflower after a certain age.

    The cutting’s age will merge with the parent plant’s age.

    This means they will flower at the same time.

    So if you are growing a cutting of an autoflower plant, the final plant will be much smaller than the parent, when it enters the flowering stage.

    When all this is considered, cuttings aren’t exactly worth it, as these particular plants are already small to begin with.

    Autoflower weed by week feeding guide

    Once your autoflower marijuana plants have reached two weeks of life, you can feed them a small amount of vegetative nutrients.

    Feed them higher quantities of it gradually over time, until your plants are either six or seven weeks old.

    Bio Bizz feeding schedule

    Don’t switch over to flowering nutrients until you have visibly noticed a stop in its vertical growing.

    Even if the flowering phase started a week earlier, don’t be premature with the flowering nutrients.

    Be guided, instead, by the ending of vertical growth.

    Lighting your autoflowering plants

    Similar to regular marijuana plants, you can decide on one of two lighting options:

    • One choice is to expose your plants to 24 hours of light per day
    • The other is to allow them some rest every day, and give them 18hours of light, and sixhours of darkness. It all depends on your personal preferences, as well as the strain that you are growing.

    One specific go-to example is to use 120-watt LED lights for the first few weeks of growth and keep it going for 21 hours each day.

    In this case, the light should be set up between 70 and 80 centimeters away from the plants.

    Once you have potted the older plants, you can convert to larger LED lights, and a schedule of 18 hours of light, and 6 hours of darkness.

    Should you prune autoflowering marijuana plants?

    While pruning (topping, specifically) can be done in a positive and helpful way with autoflower marijuana plants, certain modifications are needed when pruning regular marijuana plants.

    For instance, the pruning needs to take place very early in your plants’ lives, to avoid obstructing their vegetative growth later on.

    That being said, many growers claim that pruning autoflower marijuana plants at all is a bad idea and should be avoided altogether.

    They say pruning will lower the autoflowers’ harvest.

    If you really want to take the risk, try doing it with an autoflower strain that has been proven to take a bit longer than the others.

    This way, it has more time to recover and grow, after the pruning has taken place.

    What to expect from an autoflower harvest

    If everything goes well during your autoflower grow season, what can you expect in terms of a harvest?

    Keep in mind that the perfect environmental elements include being around 73°F, 55% humidity, 400 watts per m2 for light, good air circulation, plenty of oxygen, and a solid nutrient regimen (among other things).

    To put it bluntly, your harvest will be proportionate to the length of time that your autoflowering weed plants grow.

    In simplest terms, longer growth equals a bigger harvest.

    Know the perfect time to cut your autoflowers when you download my free mini harvesting guide.

    • Time your harvest for Perfect Taste
    • Get THC levels for a Perfect High
    • Don’t waste any Precious Bud

    Some strains that grow for about 3 months, for example, often average around 40 grams per plant.

    While longer-growing super autoflower strains might get between 150 and 500 grams per plant when grown outdoors.

    Choosing when to harvest is also difficult, and equally important to all the other decisions you might make when growing autoflower marijuana plants.

    You generally need to check your plant’s trichomes to see when 50% of them are amber in color.

    The amber color signifies the point at which harvesting should take place.

    Make sure you stop watering the plants for at least one or two days before you harvest them so that their extra nutrients go away.

    Curing and storing

    Curing your autoflower marijuana buds helps them turn into the delicious product that every grower desires.

    If you cure them poorly, then your efforts will not pay off in great taste. Curing should be done inside an airtight container.

    This is so the moisture can spread throughout evenly, and move from the middle of the bud, where it is originally held.

    During the process, open the container several times per day for a few days straight.

    Eventually, you should only open it once a day or longer, until the buds are thoroughly cured, several weeks or months later.

    Once they have finished curing, the buds should not have much moisture left at all. A tiny amount of moisture is still good for smoking, though.

    Extra dry buds actually make the smoke more unpleasant.

    Smoke it within several months, to one year. After a year, it is unlikely that the product will be as pleasant for smoking.

    Keep it in a dark, cool location. Freezing it can keep it fresh longer.

    How to grow autoflowers outdoors

    Although there are certainly plenty of downsides to growing autoflower marijuana plants, they also have some very compelling advantages, as well.

    Many would argue that their true value lies in being grown as outdoor plants.

    Or, perhaps even better, many might grow them for some time indoors, and then finish their vegetation and flowering stages outdoors.

    This usually involves between 1 and 1.5 months of indoor growth, to maximize their vegetative stage.

    Then, they are moved outdoors (assuming the temperature is not colder than 50°F).

    The reason this is considered such a good thing is because you can get several harvests within one plant’s normal growing season.

    While a huge plant will get you a massive harvest at the end of its growth, it takes 8 to 9 months to ever get that far.

    Of course, this also leaves more room for unexpected obstacles to mess up your harvest before you even get there.

    With autoflowering weed, however, you can have numerous crops growing in the same space of time.

    You are, therefore, achieving smaller harvests incrementally while avoiding a long wait to consume any of the buds.

    Your work is secured, and you are given several “chances” within the same amount of time, in case one crop gets somehow ruined.

    Autoflower marijuana plants will always be shorter than regular marijuana plants.

    This means they will not be as easily spotted as the more massive marijuana plants (which definitely tend to attract unwanted attention).

    Even if you are growing them in your own personal garden on your owned property, they can still easily go undetected throughout the span of their entire growth cycle, because of their small size.

    For reference, the most efficiently grown autos have one square meter each to themselves to grow to their full size (and harvest) potential.

    How to grow autoflowers indoors in soil

    Just like there are perks to growing photoperiod weed plants outdoors, the same can be said indoors.

    Autoflowering weed plants synergize perfectly with indoor grow rooms.

    Week by week, an autoflower can grow freely without having to worry about space, as autoflowers don’t take much of it.

    Many autoflowering weed plants grow no taller than 40 inches.

    In terms of lighting, autoflowers work well under artificial grow lights. In particular, LED grow lights are a great option for growing this type of weed.

    Despite costing more than fluorescent lights, LEDs will save you on both electricity and replacement bulbs. You can choose from full-spectrum LED lights or invest in two individual LED lights.

    You’d want two different types because each stage requires a specific spectrum for the best possible yields.

    A blue spectrum lamp benefits autoflowers in their vegetative stage, whereas a red spectrum is best for flowering.

    To get the most yield out of your plants, you can leave the lights on 24/7. This method will cost you in electrical bills, and it’s only best suited for cold climates.

    The typical ratio of 18 hours of light and 6 hours of darkness is best for autoflowering weed plants, as it’ll save you on electrical cost and give your plants time to rest.

    However, lately, many growers have tried giving their autoflowers 20 hours of light and 4 hours of darkness since it produces better yields than the 18/6 ratio but doesn’t cost as much as leaving your lights on 24/7.

    Outside of choosing the right type of grow lights and picking the ideal light schedule for your plants, you need to also choose the right strain for your indoor grow room.

    To know what strain is the one for you comes down to personal preference and experience. Whether you choose sativa or indica doesn’t matter as much with autoflowering weed.

    But, if you’re a first-time grower, don’t mess up simply because you don’t know how to grow. Stick to an easy-growing strain.

    Breeding autoflowers

    Growing marijuana is cheaper than buying weed, but the seeds cost money.

    That’s why many growers prefer to buy a single set of seeds and continue growing them by breeding.

    However, breeding marijuana is a lot more complicated than growing marijuana from seeds; that’s why we don’t recommend breeding autoflower weed.

    Instead, leave it to the experts – us – to breed high-quality autoflowering marijuana seeds for you.

    Many people wonder whether they should breed autoflower plants due to autoflowering weed plants’ short lifespan.

    Because you can grow a lot more plants in the same amount of time, naturally, that means you could use a lot more seeds. They worry about the cost of buying autoflowering cannabis seeds year after year.

    If this is your worry, you are doing it wrong.

    The main benefits of growing autoflowering marijuana are lower costs and an easier experience.

    You need less space, less time, and likely less electricity.

    Supply should not be your concern. If you focus on growing the best marijuana with the highest yield, you’ll find that you’ll have more than enough weed to last you.

    If you need some help with that, learn to increase yield by scrogging in this guide.

    When it comes to breeding autoflowers, do not make it harder than necessary. Buy extra seeds and grow more plants.

    Pros and cons of autoflower growing

    Let’s look at the advantages and disadvantages of growing autoflower marijuana plants, instead of regular marijuana plants.

    Pros of growing autoflowering weed

    First of all, you have the chance to attain a higher variety of marijuana when you grow autoflower marijuana plants.

    This is because of the shorter growing season.

    So within one season, you can grow approximately three separate strains, and get that many different varieties of marijuana for smoking!

    This is especially valuable for people who are growing just for themselves and prefer a range of highs, which can change depending on their mood or preference that day.

    Therefore, growing autoflowers can help keep things fresh and exciting on the marijuana smoking front.

    There is also somewhat less hassle involved — at least in certain aspects.

    For example, you will not need a complicated setup with one grow room and one flowering room. That means that, even if you had the space for that many rooms, you could instead use that space to time your growing so that you can harvest every few weeks.

    You also won’t have to be so careful with your lighting setup, and grow room light-proof sealing.

    This is because light leakages have no impact at all on your autoflower marijuana plants’ flowering phase.

    Another advantage is multi-crop systems, which are compatible systems that overlap nicely. They allow you to harvest a new crop every few weeks, and can be set up outside.

    They don’t require much space in your garden and are unlikely to attract much attention if any.

    In the case of power outages (which can be more frequent for people in certain locations), normal marijuana plants could have their growth and flowering phases interrupted, and their harvests consequently damaged.

    You will not have these issues with autoflower marijuana plants.

    It is also thought that, because autoflower marijuana plants contain genes from the ruderalis marijuana strain, they may be hardier than other types of marijuana plants.

    This idea comes from the fact that ruderalis plants are very hardy, and can handle cold and other obstacles better than photoperiod plants.

    These plants will also work well in indoor and outdoor areas that have height or size restrictions.

    Finally, if your growing friends are already growing their own photoperiod marijuana, you can enjoy smoking your own marijuana, while they wait and wait for their own harvest to be ready.

    Cons of growing autoflower cannabis

    This is because you will need the same amount of light per plant although these smaller plants have smaller yields.

    Light usage per gram less efficient than regular

    Additionally, autoflower marijuana plants tend to be inconsistent in terms of their speed of growth, and their size. Even individual plants within one particular strain might have varying sizes and growth patterns.

    This makes certain types of growing methods, like hydroponics, particularly difficult — if not impossible.

    Sometimes it will be necessary to harvest one crop several times until all of the plants have been harvested because they flower and mature at different rates as well.

    Some smokers of autoflower marijuana will complain that the aroma of their product is not as strong as that of regular photoperiod marijuana plants.

    Whether this is a pro or con might depend on your own personal preferences, of course.

    Male and female

    A normal photoperiod marijuana seed has a 50/50 shot at being either male or female.

    This is an unfortunate statistic for the average marijuana grower who is only interested in growing unfertilized female(sensimilla) plants.

    If you get feminized seeds, on the other hand, you can expect nearly every seed to turn out female.

    Autoflower marijuana seeds are not any different in regards to these ratios. Hermaphrodites can be expected in either case and should be watched out for, even if you are expecting all female plants, like when you purchase feminized seeds.

    Super autoflower strains

    If you have done any research into this new autoflowering trend, you have probably already discovered the term “SUPER autoflower” to describe many different seeds.

    So, what are these super seeds, and how are they different from other autoflowering seeds?

    The idea behind the super strains is that they are larger, but still share the same useful trait of flowering automatically.

    They are stronger and hardier than regular autoflower marijuana plants, especially when it comes to resistance against mold or pests.

    They were created specifically with the goal in mind of having bigger, higher-yielding autoflowering weed plants.

    Autoflower weed seeds

    Perhaps one of the most challenging aspects of the autoflower marijuana plant growing process is deciding which of the autoflower seeds to buy first.

    This is an especially important decision if you are a first-time grower or even a seasoned veteran who has never grown autoflower strains of marijuana before.

    There are a huge variety of seed strains to choose from, so it is easy to get overwhelmed by all the options. The key is always to consider:

    • What type of growing conditions the seeds will be planted in
    • What ratio of THC to CBD you would like in the strain
    • What taste and smell you prefer in your weed.

    If you have clearly defined these main points, then you will have a much easier time choosing the perfect strain for you.

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