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make feminized cannabis seeds gibberellic acid

Spray the plants to be feminized with colloidal silver every day, and three times a day if you can manage. Soak them well. Do this for two weeks, then leave the plants to grow as normal. Some growers report getting results after spraying for only 5–10 days.

Colloidal silver is by far the easiest to source or make. It is non-toxic, non-caustic, and can be bought from a pharmacy or easily online. The other solutions can be dangerous, difficult to get a hold of, and expensive—except gibberellic acid, which can be found in nurseries, but is not as effective as colloidal silver. But if you want to watch some freaky plant growth just for the fun of it, give gibberellic acid a try. It is a growth stimulant and makes plants stretch and stretch.

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.


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.


Hint: Make two clones once a plant has been selected, one to be feminized and one to be left for pollination. This way, a separate breeding space is created and accidental seeding of other plants, or an accidental sneeze pollinating a whole grow cupboard, is avoided.

Well, that is where the feminizing technique comes into play: two methods of manipulating the cannabis plant to produce only females from seed, every-time. To be truthful, it isn’t every single time. But 99% of the time is a pretty good number, and could be considered entirely male risk-free.

So those are my answers to the common objections of a feminized seed-based breeding program, however I am just a theory-crafter when it comes to this topic.

It usually takes about 6 weeks for your feminized seeds to fully develop. Some plants are literally dying right as the seeds become ready, so to get the most viable seeds, you need to try to keep it alive until the seeds actually start dropping. The seeds can be used right away, or stored in a cool, dry place for a few years. Don’t forget to label them with the date!

How do you force a female plant to make pollen?

Spray bud sites thoroughly, drenching them with colloidal silver every single day

So how do seed banks feminize their seeds? How can you breed two female plants together?

November 15 – Pollen sacs appear to be almost fully formed and are swelling in size, but haven’t opened up yet. Don’t stop spraying colloidal silver or you may end up with empty sacs!

1.) Buy or Make Colloidal Silver – The article below will teach you how to make colloidal silver at home, as well as show you where to buy it if you don’t want to make it (it’s actually pretty cheap!). It’s basically a solution of silver suspended in water and is available online and in health stores as a dietary supplement.

Using colloidal silver is one of the simplest and most reliable ways of making feminized cannabis seeds. It’s also readily available online and at local pharmacies.

Using colloidal silver for feminizing cannabis plants is essentially a four-step process. After you make the solution, you’ll spray it on a plant, use that plant’s pollen to breed feminized seeds, then collect them.

How To Make Feminized Seeds With Colloidal Silver

Three days prior to switching to a 12/12 light schedule, start spraying your plant with the colloidal silver mixture at least once per day (but preferably three times per day) until you see it begin to develop male pollen sacs. Don’t be shy – make sure you get them nice and wet. You should begin to see changes forming in your plants between five and ten days after you begin spraying. Once you begin to see male pollen sacs, they should fully develop in three or four weeks.

Colloidal silver and gibberellic acid are both scientific ways to get feminized seeds. However, if you’re wondering how to sex marijuana seeds without chemicals, rodelization is a natural, albeit unreliable way to do it.

Next, you’ll need to collect the pollen once it fully develops. Cover the top of your pot with something to collect the pollen. Then, using a watercolor brush or piece of cotton, gently brush the pollen spores over a female plant. Do this to a female plant that’s about two or three weeks into the flower cycle. You can pollinate a single branch of a plant, or even an entire female plant for maximum seeds.