Cannabis genetics are often sourced from external companies and organizations such as nurseries and seed banks. For the individual grower, saving seeds and pollen removes this reliance on external companies. This is especially true with pollen, as very few (if any) companies offer pollen to the public.
When collecting seed by hand, use a fine screen to help catch trichomes that will break off during the process. This material is valuable and it would be a shame to waste.
The Benefits of Long-Term Storage
It’s important to continually practice germination testing to be sure your stored seeds haven’t lost all viability. To test this, periodically plant a seed and document its ability to germinate.
As mentioned above, the best way to reduce moisture in pollen is to mix it with flour. For long-term storage, it can be kept in a sealed vial or freezer bag. You can keep it in the refrigerator or freezer, though for optimal long-term storage, the colder the better.
To tell if a seed is mature, take a look at its shape and color. Premature seeds will be small and light in color, taking on a beige hue. Fully mature cannabis seeds are more full in shape and size and have a much darker brown hue, sometimes accented by black tiger stripes.
An old rule of thumb is a 35 mm film canister will hold about 1000 seeds. You’ll get about half canister per oz. in moderately seeded ounce of bud,or roughly 5-7 grams of seed. Heavily seeded bud can fill the canister per oz. of bud. Do the math when you know your yield of seeded dry bud.
As for how long it takes for a naturally pollinated female to produce mature seed. It varies by strain,but generally it’s 3-6 weeks after pollination of the female flowers. Sometimes it can be a week shorter on the low side and couple of weeks longer on the high side.When 60-70% of the seed is mature,so is the bud,it’s at peak THC production. If you want a stonier high you can let go a couple of more weeks to let the other cannabinols develop.
How do you know when the seeds are mature? The calyxes holding them begin to split,and you can see the seed. Pull a couple out,check for firmness and color. A firm seed,tan to dark brown in color is what you’re looking for.
Indicas are notorious for producing a boatload of seeds. A healthy outdoor grown Indica,fully pollinated, can produce literally thousands of seeds.