Seeds for next year's butterfly garden

I was packing some seeds I collected this fall. These are host and nectar plant seeds that I sell to my customers. I found out the hard way that it is best to let them dry thoroughly before sealing them in small bags. The fennel seeds had mildewed and I had to throw them out. I also have seeds from Black-eyed Susans, Cosmos, Coreopsis, Verbena, Marigold, Crocosmia, Hop tree, Tropical and Common Milkweed, Oregano, Mexican Sunflower, and Catnip.