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how to make feminized cannabis seeds

We are sure that by now you’d probably have grown some feminized seeds, maybe even though you are a purist and the fiercest defender of regular seeds. But. do you know where feminized seeds come from? Are you familiar with the processes used by both breeders and growers to obtain them? In this article we explain everything!

Let’s see now the most popular ways to reverse the sex of a female plant in order to produce feminized seeds.

Advantages of growing feminised seeds

Feminised seeds grown indoors, 100% female plants

It is worth stating that one of the side effects of gibberellic acid is a significant stretching of the treated parts of the plant, so don’t be surprised if this happens to your plants! The recommended dose to achieve the best results is approximately 100ppm.

This is another lie that some people believe. As it’s been mentioned before, a female plant is sprayed with some chemicals in order to inhibit its ethylene action. After a few weeks of this and once in the flowering period, the plant will produce male flowers and pollen, which will be harvested to pollinate the female plants designated to produce seeds. Once the seeds are formed, they are collected and packed immediately, so they don’t come into contact with any chemicals or the plants that produce seeds, nor, of course, with the seeds themselves. Also, to produce cannabis seeds, you normally need two separated indoor cultivation areas, one for the reverted plants (treated females) and the other for the females to be fertilized to produce the seeds, so the latter can’t get “contaminated” with any chemicals.


Colloidal silver is a distilled water-based solution in which microscopic particles of silver are suspended. The nature of colloids means the particles will never settle out and can’t be removed by normal filtering. Colloidal silver is available commercially, or you can make your own if you want to totally geek out (see how-to section at the end). It has numerous uses as an alternative medicine. For example, it is used to soothe burns, as an antiseptic and digestion stimulant in people, and as a fungal control in horticulture.


There are a number of solutions that can be sprayed on female plants to create male pollen sacs: benzothiadiazole, gibberellic acid, silver thiosulphate, silver nitrate, and colloidal silver.

  • Cover the top of the pot with plastic or card to catch pollen as it falls, or modify a plastic drink cup to shroud the plant and catch falling pollen.
  • Fix a clear plastic bag, perforated at the top for air exchange, around the whole plant.
  • An experienced eye will remove each flower pod prior to it bursting completely open to be sure of catching every spore.
  • Pollinating a female is the easy bit. Depending on how many seeds you want to make, there are a couple of methods that can be used.
  • Using a watercolour or other fine, soft brush or even a cotton bud, dip into your pollen collection and gently apply to the chosen flower. Although thousands of viable spores will be on the end of the brush, enough to pollinate a whole plant, the trichomes on the surface of the pistils will greedily glue everything you offer them. So dip into your pollen stash a few times as you dust.
  • For lots of seeds, put pollen in a bag and put over a whole branch or a whole plant, shake well, and leave for twenty four hours.
  • It is possible to pollinate different branches with different pollens and have a breeder plant that has 1, 2, or 15 different crosses on it.
  • It is also possible to self-pollinate the plant from which the male parts were created. This won’t produce as many seeds as pollinating a separate plant because less female flowers are produced and many are nonviable because of the feminization process.

The easiest and relatively inexpensive way—considering how much money is potentially saved by not growing resource and time-consuming males—is to buy a colloidal silver generator, which is the no-fuss plug and play option. Or, make your own, which is quite straightforward and doesn’t require any special skill.

Without access to pure silver, it’s necessary to use tools like a battery and connector, alligator clips, and a soldering iron. With these, the alligator clips will be attached to silver coins. The coins will need to be placed in the water without the alligator clips getting wet at all. This needs to be left alone for at least seven hours, so the silver ions will float to the top. The mixture mentioned above can then be created and used on the plants that are intended to create female pollen.

The next method that growers can use is colloidal silver. Colloidal silver, or pure silver, is basically mixed with distilled water and placed in a spray bottle. This is then sprayed onto the female plants while they’re flowering. Once this is done, they start to form pollen sacs that contain female pollen. This means it’s very likely that the resulting seeds will produce female plants. However, the process can be a little complicated, as there are more steps needed if the grower doesn’t have access to pure silver.

Buying feminized high thc seeds is still the best option for those who want to minimize the work needed to have all female plants or for those who do not have the time or ability to feminize seeds at home. Those who do want to try feminizing seeds can try some of the most popular methods available today.

Using Colloidal Silver to Create Feminized Marijuana Seeds

There are times when growers will want to produce marijuana seeds. This can happen if they’d like to create a blend of two or more different strains or if they’d like to cut down on the costs to grow marijuana on their own. If they plan on trying out feminizing seeds, they’ll need to first produce some seeds that they can experiment with. Thankfully, it is easy to get a female plant to start producing seeds. All that needs to happen is the male and female plants need to be kept together, and the male plants will pollinate the female ones.

When marijuana plants aren’t fertilized and are reaching the end of their life, they go through a period of stress and can naturally produce pollen sacs. These contain the female pollen, which can be used to pollinate other female plants and will most likely create only female plants. Growers can take advantage of this natural way to create female pollen and feminized seeds using rodelization.

Growers must understand the sexes of marijuana plants and be able to tell the difference between male and female plants. When the plants are first growing, it’s difficult to impossible to tell which ones are male and which ones are female. When they have grown a bit and are nearing the end of the vegetative stage of their lifecycle, however, it’s possible to start to determine the sex of the plants. The male plants will start to grow what looks like buds, and they will give off pollen if they’re shaken. A couple of weeks after these appear, female plants will start to grow their buds as well. These do look different, so knowing the shapes can make it easier to tell which one is which.

One option growers have is to use feminized seeds. These seeds have been specially treated to ensure they only produce female plants . This reduces the worry about male plants growing and enables the grower to better predict how many female plants they’ll have. With the latest methods for feminizing seeds, it is possible to end up with 100% of the seeds planted growing into female plants.