Heart-leaved or Blue Wood Aster is a herbaceous perennial that grows to 3 ft. tall. Pale blue to violet to white flowers bloom in large, loose panicles. Pinching back flowers will make bushier plants. Grows in average, dry to moist, well-drained soils.  It does not tolerate poorly drained locations.  Host plant for the Pearl Crescent butterfly. Flowers are attractive to bees and butterflies. Songbirds and small mammals eat the seeds. Takes sun to part shade.