I'm in california (zone 9b) and there's some plants in my garden that are forming their seed pods. I am too excited and I want to harvest the seeds from them now-- in this case in talking mainly about my poppies and Nasturtium. The seeds are still green/ yellow-is. Do I have to wait till they brown and dry up before I collect? Would collecting before they fall naturally off the plant affect the viability of the seed?