The milkweeds—swamp milkweed, common milkweed and butterfly weed—are excellent additions to the native plant garden. But in my opinion, swamp milkweed is the star of the milkweed show. Swamp milkweed (Asclepias incarnata) is a favorite nectar plant of many bees and butterflies. It’s a perfect choice for borders, stream or pond banks, moist areas, and butterfly gardens. How It Grows…