Once the plants have been sprayed with colloidal silver and the pollen is collected, they are write-offs—86 them and don’t smoke them. Giving them a thorough rinse will not work. The colloidal silver is a systemic treatment absorbed into the plant through the foliage and not a topical application. Be safe and bin them.
Sinsemilla is an unnatural state for cannabis. Without human intervention, it would be rare to find an unpollinated female in the wild—unless it was sterile. When sinsemilla plants are left to go beyond their desirable maturation stage by a number of weeks, the plant, through whatever amazing processes evolution has bestowed, knows it has not been pollinated. As a last ditch effort at propagation, it will produce male pollen sacs in an effort to self-pollinate.
When sexing begins, male pollen sacs will develop instead of female calyxes and pistils. Male plants mature much faster than females, and viable pollen can be expected within 3–4 weeks once the plant has been sexed. Some growers will spray until the plant shows sexual growth, just to be sure the method has worked. Make sure these plants are well-isolated from any flowering females. A burst pod can release millions of pollen spores, and it only takes one spore per hair to create a seed.
TECHNIQUE 2: RODELIZATION
Plants bred using feminization are homozygous. This can have two effects that can’t be assessed until the seeds are grown. Homozygosity will increase the dominant or recessive traits of the parent in the progeny, so features you don’t want and do want can be amplified. Genetics is a weird, weird thing.
This is not the result of genetic or stress-induced hermaphroditism. They are genuine XX chromosome female bananas. With all the genetic information from the female and no Y chromosome, using rodelized pollen creates female-only seeds, although as with colloidal silver, an occasional male may appear.
Feminized seeds are super efficient for indoor and outdoor gardeners. Area, time, and resources aren’t being given to plants that will be thrown away two weeks after the 12-12 flip. Similarly, outdoors where a large plant can consume a lot of time and resources in upkeep prior to the autumn show of flowers, feminized plants are also a good way to reduce guerrilla crop pollinating. There’s nothing worse than bush-bashing out to a well-hidden crop only to find a rogue male or two have impregnated every female plant.
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.
The sex of cannabis plants is determined in the same way as ours, through the so-called sex chromosomes or genosomes. Male plants have a couple of different sex chromosomes called “XY” or heterogametic, while female plants have two chromosomes called “XX” or homogametic. When crossing a male (XY) with a female (XX), we will obtain around half of the plants of each type in their offspring. In other words, when a breeder uses a male and a female plant, the seeds produced by them will be approximately 50% males and 50% females.
Once again, this is a false statement. We have already pointed out that by using these sex reversal techniques we inhibit the ethylene action in the female plant, and under no circumstances the seeds (or plants) are genetically modified. The sex chromosomes of the female plant converted into a male plant are still female (XX), nothing has changed at a genetic level.
Stress or rodelization
One of the first methods used to obtain seeds that produce female plants was stress or rodelization. There are several ways to stress the cannabis plants to make sure they develop male flowers, such as through temperature, nutrition, photoperiod, and pH. However, supporters of this technique often prefer something as simple as delaying the harvest 2-3 weeks in order to force the plants to develop a few male flowers without stressing them as much as with any of the other methods we have mentioned.
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:
Male flower produced by rodelization
Those who want an exact copy of a specific plant will often find it’s easier to simply clone the plant they like. This is done by taking a clipping off the plant, dipping it in a rooting hormone, and placing it in water. After a few days, the cutting should start developing roots. Once it has roots, it can then be planted in the growing medium being used and will start to grow into a new plant.
If male plants are left with the female plants, they will pollinate the female plants. This leads to female plants producing new pot seeds. The pollination cuts down on the consumable bud that can be harvested from the female plants, as they put their energy into seed production instead of flower production. However, it is still possible to consume the bud from the female plants if they have been pollinated. The seeds just need to be removed first. Novice growers will end up doing this and just removing the seeds at the end because they won’t want to worry about detecting which plants are male.
Despite the benefits of avoiding pollination, there are some times when growers will want their female plants to be pollinated. If they plan on using their own seeds for the next batch, they’ll want to pollinate at least one of their female plants. It is possible to move one male and one female plant to another room to allow pollination to occur, but to prevent all the female plants from being pollinated. This allows the grower to produce one batch of seeds but get as much as possible out of the remaining female plants. Growers may want to do this if they want to learn how to feminize marijuana seeds or if they’re looking to create their own blend. The benefit may not be worth the risk for beginner growers, as just one wrong move and your whole crop can go to seed.
An Alternative to Feminized Seeds – Marijuana Clones
The regular seeds that come un-feminized generally turn into half male and half female plants, but an unlucky grower might have a batch that turns out to mostly grow into male plants. This would mean, if they don’t want their female plants to produce seeds, they’ve got to dispose of most of the plants that grow during that batch. This leads to a much smaller harvest than they might have expected.
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.
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.
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.