I've been saving the seed pods from milkweed for a few years now. I find places to plant them hither and yon. Just sent some to my daughter in western Canada. I have no idea how the monarchs find them, but find them they do. Three years back we saw no monarchs at all. Two years back only one. Last year I think three. This year three so far--assuming they are each different butterflies or not viceroys. It's a thrill to see bees on a daily basis. Gives some hope for this planet.