By infusing them with ruderalis to ensure the autoflowering trait, breeders have created autoflower seeds that are almost indistinguishable from the photoperiod originals when it comes time to sample the flowers. Step 6 Poke some holes. Familiar places you will find the weed growing are the edges of forests, roadsides, and gardens. Source:
https://www.sierrawoundcare.com/how-lengthy-do-weed-seeds-stay-good/