If you want to make your own feminized seeds, I recommend you the STS method, it is the most used for some reason. You have to be careful not to inhale the gases it produces, protecting yourself with a mask, safety goggles and gloves for its manipulation, but it is the most effective technique. It is surprising to see an elite clone bloom as a male after having grown it many times as a female, I invite you to try it.
The technique for producing feminized marijuana seeds with colloidal silver is based on the same theory as the STS one. Both use silver to inhibit the production of ethylene in a female plant, and that this specimen blooms as a male and releases pollen.
With colloidal silver there are also several spray applications during the night cycle in some of the first days of the flowering cycle. The silver used in this method, or in the STS technique, is a heavy metal that can be toxic. It is therefore important to cover the substrate so that possible droplets from the sprayed leaves do not wet the soil.
👌 How are feminized seeds made with gibberellic acid?
Feminized seeds were a revolution when they came on the market more than 15 years ago. Nowadays they represent more than 75% of the worldwide sales of marijuana seeds, and this is no coincidence, as during this time they have proven to be just as good, or even better, than regular seeds. In this article we will see different ways to create 100% feminine seeds, are you in?👉
This is something they do naturally as a way of perpetuating the species. When a female guesses she’s going to die and hasn’t been pollinated, she spontaneously generates fertile male flowers to self-pollinate and continue with the lineage.
Yes, there are, although not as effective and reliable as with STS, so we do not recommend them. But if you want to know other ways to make 100% feminine seeds of your favorite weed I’ll tell you. First of all you have to understand that all techniques are based on stressing a female plant to revert its sex to male, so it can produce flowers with which it can pollinate another female.
The females chosen to be reverted to male have to undergo a number of tests to prove that they are suitable for reversion. These tests are based on the resistance and sexual purity of the selected specimens and basically they try to induce different types of stress. Only plants that stay fully female will pass the test and then they can be considered good breeding tools.
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.
The next step needs to be done carefully. Female silver haze plants that are going to be pollinated should be separated from the plants that won’t be pollinated to avoid contamination. Next, the grower will need to place some of the pollen in the cola of the female plants that are going to be pollinated. This can be done by placing the pollen in a bowl and using a small paintbrush to place it on the plant’s cola. Avoid putting it on more than one for each plant and make sure the pollen doesn’t get on the flowers. After four days, the plant can be put back with the other female plants, and lighting can be switched to 12 hours light and 12 hours complete darkness.
Understanding the Sexes for Marijuana Plants
Once it does produce pollen, the grower can take the pollen from the plant and save it for when the female plant is ready. Growers can put the pollen in an envelope, then put that in the freezer to ensure it stays fresh as long as possible. The female skunk cannabis or gorilla glue strain plants should be kept in the vegetative stage as long as possible so they can grow bigger. When it is time for them to move to the flowering stage, the grower will need to decide which female plants to pollinate.
This method is often the easiest because it relies on the natural tendencies of female marijuana plants. However, it’s not always going to lead to feminized seeds. For one, the plants may not go through this stress period, even if everything is done right to encourage it. And, even if the plants do produce the pollen, it won’t necessarily lead to feminized seeds.
Buying feminized seeds is the easiest way to make sure the plants grown are going to turn out to be female. However, this isn’t always the best solution. For one, it can be expensive to purchase new feminized seeds for each batch the grower plans on growing, especially if they grow indoors and plan on multiple harvests throughout the year. It’s also not the best option if the grower is working on creating a unique strain or blend of strains that they want to continue growing, as they won’t be able to buy feminized seeds for their own unique blend.
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 sativa plant treated with STS started flowering as a female but soon developed male flowers
It is not surprising, therefore, that at present, feminized seeds represent virtually all the seeds in the market, since they offer a number of significant advantages for both professional and home growers and breeders, for photoperiod and autoflowering plants. The main disadvantage of this method is a well known and hotly debated issue: the growers who buy this type of seeds cannot produce their own seeds in the absence of male plants, so the only way they can manage it it’s using the same process to obtain this type of seeds. But. what are these processes and what are they based on?
Marijuana and hermaphroditism
Let’s see now the most popular ways to reverse the sex of a female plant in order to produce feminized seeds.
Nothing could be further from the truth. It is true that sometimes some plants develop weird traits or mutations, although this also happens with regular seeds. Unfortunately, there seems to be not enough studies comparing the ratio of specimens with mutations of one or other type of seeds; however, given the millions of feminized seeds that have been germinated in the last 20 years, if mutations would pose a problem, the quantity of feminized seeds sold would certainly not be so high, and this would be a “public security” issue within the cannabis sector, both for the growers and the producers of the seeds.
There are several ways to secure that a female plant produces pollen, and almost all of them require some type of chemical that is often sprayed on the plant. Once sprinkled with the chosen product and under a flowering photoperiod, the plant will flower normally, but as a male instead of female, producing ‘feminized’ pollen (which only contains chromosomes XX) that can be used to pollinate other females in order to produce seeds. These are some of the most commonly used techniques:
As you can see, and although we normally use the expression “reversing the plant sex“, that is not exactly what is done, because the sex chromosomes of the female plant (XX) have not changed, even if we managed to produce male flowers. This “sex change” of female plants can be achieved in a number of ways, but usually with the same goal: to reduce the level of ethylene in plant tissues and/or inhibit the ethylene action, which makes the plant develop male flowers on entering the flowering period, as if it were a male from regular seeds. This is because ethylene is a natural regulator of the sex expression in plants!