When we choose the varieties we want to cross we have to look at the desirable qualities, such as taste, production, effect, speed, and so on. But it must be clear that these features are only useful if they are transmitted to the progeny, a good phenotype is only a good phenotype if its qualities are not transferred to its descendants. On the other hand, if it transmits those qualities, it can also be considered a good breeding tool.
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.
Requirements for parental selection
The first feminized seeds on the market were made by naturally stressing a female to pull out male flowers with pollen. This is not a good method, since plants that revert under natural stress can easily transmit this trait to their offspring. It often happened that those feminized strains were hermaphrodites, so natural stress is not a good way to reverse cannabis females.
Photograph of a hermaphrodite marijuana bud where you can see both male and female flowers*
If you have already accomplished this step and your only concern is to know how to extract feminized seeds from a cannabis plant, I am going to explain it to you briefly.✍
Gibberellic acid has long been used to obtain feminized seeds, but most professional seed banks now use silver nitrate, which is considered more effective.
Making your own feminized seeds can be done with different methods. The most common methods are:
Present in its natural state in plants, it is cultivated in the laboratory in the form of a mushroom and marketed in the form of a GA3 spray. In the cannabis sector, it has several uses. It promotes germination, lifting the dormancy of some old seeds or those that have difficulty germinating. Some use it to obtain larger female flowers, provided that they do not exceed certain dosages. But GA3 is mainly used to reverse female plants. The spray is deposited on cotton which is applied directly to the female flowers of the selected plant, at the beginning or in the middle of flowering. Become a hermaphrodite plant, it will be able to pollinate a group of clones which will then produce only feminized seeds.
Colloidal silver also allows the reversion of female cannabis plants. It is easily found in online stores and it is possible to prepare it yourself. All you need is colloidal silver with a 9V battery, 2 alligator clips and two silver coins – and a YouTube tutorial to tell you what to do!
For growers who had the opportunity, the best solution for growing only females was to obtain cuttings of female plants or to take clones themselves from selected mother plants. However, not all growers can afford to produce their own cuttings. You must have an indoor growing space with specific lighting and the possibility of growing over a long period after selecting one or more mother plants. It is not always easy to make your own cuttings and growers need to know a number of techniques. These are the reasons that led to seed banks producing feminized seeds.
Making feminized seeds isn’t easy at all. We therefore recommend buying high quality feminized marijuana seeds from a reliable source. Yet, if you are dare a devil you can try to make them yourself.
Feminized seeds first entered the cannabis market about 15 years ago. Even if some seed banks were initially reluctant. In the meantime, virtually all of them now sell feminized seeds in their catalogue.
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