Swamp milkweed can be your butterfly and pollinator magnet when its more famous orange cousin, butterfly weed, winds down, This native perennial, which provides nectar and pollen for monarchs and an array of visiting insects, grows about 4 feet tall and 2 feet wide. After flowering, more seasonal interest is not far behind. Seed pods develop, stuffed with gossamer parachutes attached to single seeds. Pods split open and seeds are carried aloft into the breeze to find new homes. Swamp milkweed prefers full sun and moist soil, as it name suggests, but can grow in moderately moist soil. The base of a downspout, a rain garden or a somewhat damp spot in the yard is a perfect location.