I used to get mine from a food co-op I belonged to, but I'm sure I've seen them at a natural food store as well. You're right - you don't want to use treated seeds. I should have mentioned that. My garden is still mostly snow-covered, but I need to get outside with a pair of clippers and start taking down things that grew last year in my crocus bed beside the front door. It's almost time for those to pop up.