Ice Ballet’ Swamp Milkweed (Asclepias incarnata) lights up the mid-summer garden with vanilla scented, pillowy clusters of snow-white flowers. Deep green foliage and white flowers that bloom from mid-summer to fall are the perfect backdrop for brightly colored butterflies that visit each summer. A pollinator-favorite, especially for Monarch butterflies, this easy-care milkweed is happy in a sunny spot with moist soil.