Elliott's Aster, Symphyotrichum elliottii, is a perennial that is a robust plant that often stands more than 4 ft. tall by blooming time. Flowering occurs in the fall and the entire crown of each stem is a mass of light lavender (sometimes white) blooms. Individual flowers are about 1 inch across. It is one of the best asters for butterflies and other pollinators, but reseeds heavily and colonizes in its preferred moist to wet environment.