It is very difficult to grow milkweed from seed. Check with the Xerces society to find out which milkweed is native to your area. Seeds need cold stratification for 60 days to germinate. I put mine in the fridge in a zip lock bag in wet play sand.
Then it helps to plant in pots in a green house. Check out Mr. Lund the science guy on youtube to learn more about it.
Warmly,
Mary Anne
Monarch Sister Schools Program
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Mary Anne Rishebarger 410-599-2860
Zero-Waste = RETHINK what you discard