Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .
Make sure the area the seeds are in is warm, somewhere between 70-85°F.
This is the beauty of seeds—often, you can tell which plants or genetics will thrive right from the get-go. This will help you determine which plants you want to take cuttings from for clones or for breeding if you want to create a seed bank of your own.
Germinating cannabis seeds doesn’t always go as planned. Some seeds will be duds. Others will be slow and take longer to sprout. But some will pop quickly and grow rapidly.
In commercial cannabis production, generally, growers will plant many seeds of one strain and choose the best plant. They will then take clones from that individual plant, which allows for consistent genetics for mass production.
Seeds found in finished cannabis buds can develop for a number of reasons. For example, a male plant may have accidentally pollinated a flowering female during the growing process. But more commonly, they’re a sign of stress and can be attributed to high temperatures during the final stages of flowering or an exaggerated spike in climate or environment.
You can also minimize headaches and avoid the hassle of seed germination and sexing plants by starting with clones.
Treating cannabis seeds with a silver thiosulphate solution can ensure the resulting plants are females. (Courtesy of Kannabia)
Once those plants are old enough, growers have to go to the trouble of actually determining their sex, monitoring each individual plant to ensure any males are removed before they can pollinate their female counterparts.
There are a few techniques that can produce reliably feminized seeds. One classic method is stressing out a healthy female plant by interrupting its light cycle during flowering. While that works to an extent, the more common and controlled method is to spray down female plants with a collodial silver or silver thiosulphate solution. This method makes it possible to control the sex of a plant without any genetic tinkering or modification.
How Are Cannabis Seeds Feminized?
Growers can avoid spending weeks nurturing plants with only a 50% chance of expressing as female and maximize the space and plant count in their gardens by using feminized seeds from suppliers like Kannabia. These specially-treated seeds increase the probability of producing a female plant to 99%.
This article is sponsored by Kannabia Seed Company, an award-winning cannabis seed company headquartered in Spain. Using only the highest quality genetics on the market, their grower-oriented approach has made cannabis cultivation simple and satisfying for growers of all skill levels for years.
Using feminized seeds can make it easier for home growers to cultivate strains like Russian Doll. (Courtesy of Kannabia)
Cannabis plants that are pollinated naturally or with traditional breeding techniques can produce both male or female seeds. These are known as regular seeds and, as in most species, they occur with about an even split between the two sexes. That means cannabis cultivators starting with standard seeds have about a 50% chance of yielding a female plant from each one.
The steps for growing cannabis from feminized seeds are the same as growing from regular seeds. If you understand the laws and regulations where you live and want to give cannabis cultivation a try, keep these things in mind.
Photo by: Gina Coleman/Weedmaps
Beyond the fact that male cannabis plants produce pollen sacs instead of flowers, having males plants around female plants can ruin an entire harvest. That’s because male plants pollinate the buds of young female plants. When that happens, the flowers will be full of seeds, lowering their quality and value.
Do feminized seeds produce seeds?
Autoflowering seeds have been bred to move into the flowering phase without needing changes in light to activate the production of flowers. Whether cannabis seeds are seeds doesn’t have anything to do with when plants enter the flowering phase. Feminized cannabis seeds have been bred to grow only female plants.
Breeders and growers developed feminized cannabis seeds to address these challenges. By increasing the likelihood that all your seeds will produce female plants, you eliminate the possibility of getting a male plant that won’t produce flowers and of having a male plant accidentally pollinate flower-bearing female plants.
Growing cannabis is all about your goals and preferences. There is no inherent reason why regular female marijuana seeds would be considered better than feminized seeds. With that said, feminized seeds:
While feminized seeds generally grow only female plants, there is no 100% guarantee whether you buy feminized seeds or create them yourself. Every once in a while, a feminized seed will still grow up to become a male plant. For this reason, it’s a good idea to keep a close eye on your plants as they mature. If you ever see pollen sacs starting to form, remove the plant before it accidentally pollinates and ruins your female plants.