My only imput on the subject of Second Helpings:
I was thinking = if I have left over packs of seeds that someone has dibbs on, I could throw an extra pack, or all of my extras in their bag. Unless, it's something that I really like and might like to keep for myself or something that I think I would like to use in another swap.
With herb seeds, some of them I actually use in cooking too, so I might rather keep those and use them in the kitchen.
