Answer: I've never heard of anyone planting milkweed--at least the kind that grows wild in my back yard. But this common milkweed is related to some cultivated types, including annual bloodflower milkweed (Asclepias curassavica) and perennial butterfly weed (A. tuberosa). Directions for bloodflower milkweed say to sow seeds thinly, and cover with about 1/4" of soil. I'd try this for your seeds. Good luck!
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