Common Milkweed for Monarchs (Asclepias syriaca) 100 Certified Pure Live Seed, true Native seed FREE SHIPPING Number of seed is Pure Live Seed, not bulk Species is US Native, not introduced alien We grow the seed so we control the quality A 3' to 6' tall native perennial with globular heads of lavender to rose flowers. A late spring and summer flowering plant growing in dry to medium soils and prefers full sun.