I've had it happen to me!!! At my old home.... I had this little spot near the sidewalk where I planted zinnias and in front of them were marigolds! On my way to leave for work I noticed a dog walker taking my marigold seeds. When I got home.. I made a sign saying.. "free zinnia and marigold seeds - leave me your address i'll drop them off" I saved some for myself and I had 4 neighbors request seeds then.. and ended up doing seed/hosta/daylily swap!
