Find out what feminized cannabis seeds are and what they are used for from the pros at Atlas Seed. Just like humans, cannabis and hemp plants are considered dioecious, meaning they have either male or female reproductive organs. Depending on the goal of the
What Are Feminized Cannabis Seeds & What Are They Used For?
Feminized hemp and cannabis seeds are produced to grow primarily female plants, while regular hemp and cannabis seeds have a 50% chance of being female. Since cannabis is a dioecious plant, it evenly produces male and female plants, or plants with male and female flowering parts. The feminization process allows breeders and seed producers to create seed that is almost entirely female. Though our exact recipe, frequency, and timing are proprietary, generally feminization is done with a colloidal silver spray.
Producing primarily phenotypically presenting females is an efficient approach to streamlining the cultivation of cannabis and hemp flower. Though there is no way to completely remove the risk of male plants pollinating and seeding female flowers (as least with normal, diploid cannabis), farmers and cultivators can save an enormous amount of production space and time by removing males from the equation at the beginning of the growth cycle of the cannabis plant.
Not all feminized seeds are produced equally, since the execution of the process is easy to learn but tricky to master. We’ve heard many anecdotal stories of fly by night seed producer lots producing 20-30% males, so apparently it’s a thing you can encounter if you’re not careful. Atlas Seed feminization rates tend to range from 1:1000 to 1:4000, or 99.99% in either case. These rates are comparable with the best produced feminized seed in the world. To date we are not aware of anyone offering “100% feminized seed.” Some breeders and producers allege that their feminized seed produces no males but will show a small amount of herms, which from the perspective of the grower is merely semantic, since we are in either case talking about pollen producing male parts that will seed your crop.. With Atlas Seed’s feminized cultivars, depending on the amount of plants you have per acre, you’ll basically end up with somewhere between 10-20 males per acre. For more information on conducting a proper hunt for male and hermaphroditic plants, please see our male hunt guide here.
Male vs. Female Cannabis- Why it’s important to know before you grow
Just like humans, cannabis and hemp plants are considered dioecious, meaning they have either male or female reproductive organs. Depending on the goal of the cultivator, it’s crucial to know the gender of their plants prior to harvest.
Both male and female cannabis plants have their benefits; growing both can result in cross-pollination and thus seeds, resulting in new genetics or seeds for the next crop. However, if your goal is to produce quality buds rich in cannabinoids, it’s crucial to isolate the males from the females to avoid pollination and seed production. Cannabis pollen is extremely potent; studies have shown that pollen can drift across 3 to 7.5 miles, and can reach over 30 miles if high winds are present.
Removing males will allow the female plants to grow abundant, seedless buds (called sensimilla ). When female plants are left unfertilized, they use that extra energy meant for reproduction to produce higher levels of cannabinoids like THC or CBD, depending on the strain. The resinous buds consumers purchase at dispensaries are all sensimilla.
How to Visually Determine the Sex of a Cannabis Plant
Cultivators can visually determine the gender of their plants about 4-6 weeks into the growth cycle (though this may differ for indoor grows) when the plant is transitioning from its “vegetative” stage into the “flowering” stage. At this time, the plant is no longer focusing its energy on growing bigger and taller and instead spends all its effort growing flowers for pollination and reproduction.
When a cannabis plant is beginning to enter the flowering stage, cultivators should pay careful attention to the area between the nodes of the plant, where the leaves and branches extend from the stalk. Pre-flowers will begin to form in the nodes of the plant, and characteristics of the pre-flower will vary based on gender.
Pre-flowers can initially be difficult to examine with the naked eye, but growers can use a magnifying glass to get a closer look. Female cannabis pre-flowers grow as tiny bracts which will eventually produce hair-like stigma; male plants produce small, round balls as the nodes.
In some cases, a plant may exhibit both male and female pre-flowers. Hermaphrodite cannabis plants can occur when a plant becomes excessively stressed due to things like plant damage, bad weather, disease, nutrient deficiencies, and poor genetics. Hermaphrodites can also produce anthers, often referred to as “bananas” due to their appearance. It’s important to monitor plants that have been exposed to stressors to ensure they don’t begin to develop both male and female genetics. Hermaphrodites are capable of producing pollen and can ruin an entire crop.
How to Determine Gender Before the Pre-Flower stage
Lab genetic testing can determine a plant’s gender as soon as it begins to sprout its second set of true leaves. Knowing sooner can help cultivators save money, increase canopy space, and decrease labor costs associated with transplanting, watering, monitoring, training, and removing unwanted male plants.
Just as humans have X and Y chromosomes, cannabis also has a genetics system that determines the plant’s gender. However, figuring out the gender based on the DNA of a plant prior to the flowering stage is not as simple as looking for an X and Y. Luckily, the specific genetic sequence that differs between female and male plants has long been discovered, so using quantitative polymerase chain reactions (qPCR) allows labs to determine the gender of any plants with 100% confidence.
When a sample is brought in to Infinite Chemical Analysis Labs for gender identification, qPCR analysis is used to determine if the plant is female or male. A small hole is cut out of the leaf of the plant and added to a lysis solution to destroy the plant cell walls, exposing the DNA. After isolation of the DNA, it is transferred to another plate that contains reagents to amplify and cause the sample to create a fluorescent light that our qPCR instrument then quantifies, and determines the gender of the sample based on the amount of fluorescence.
Between sufficient lighting, proper nutrients, a detailed watering schedule, and constant monitoring, identifying the sex of your plants is another tedious yet crucial task that could make all the difference come harvest season.
Gender identification testing is now available at InfiniteCAL to help cannabis and hemp cultivators take the guesswork out of their grow. If you’re interested in learning more about Gender Identification Testing, reach out to our team at [email protected] .