I had some milkweed planted out front, but a tree grew up around it and shaded it out. Despite the shade, lack of water and complete neglect it flowered every year. I’ve relocated it to a somewhat sunnier location. Pictured above are some new ones I planted last week. They are in almost full sun. The one that gets a little bit of afternoon shade is doing well, the one on full afternoon sun is struggling.
More info and photos after they’ve settled a bit