Swamp Milkweed (Asclepias incarnata), 150 Certified Pure Live Seed, True Native Seed FREE SHIPPING Number of seed is Pure Live Seed, not bulk Species US Native, not introduced alien We grow the seed so we control quality A 4 to 5 native perennial with terminal clusters of showy pink and white blossoms. A summer and early fall flowering species preferring medium to wet soils and full sun.