How to collect weed seeds
Pollinated buds look quite different from regular sinsemilla. They usually don’t have as many rich trichomes and don’t form into large colas. Instead, they’re usually smaller and a lot more bulbous.
4 weeks after pollinating your female you can begin checking in on your seeds to see if they’re ready for harvest. Simply pick seed out from a pollinated bud; mature seeds will have an incredibly hard shell and be a dark brown or tan colour. They might also have some light striping on the outer shell.
If your weed seeds don’t meet this description, let your plant develop a little longer. Some weed plants can develop mature seeds really late into their flowering cycle. If that’s the case, make sure you keep your plant alive with plenty of light and nutrients.
Once you’re convinced your seeds are mature, simply harvest your buds and dig in deep to get out all those beautiful seeds. You can store weed seeds in a cool, dry place for at least a few years or germinate them to start growing new plants immediately.