Symphyotrichum cordifolium - Blue wood aster
Blue wood aster is a showy herbaceous perennial that produces blooms attractive to butterflies. It easily self seeds and grows well in full sun to part shade.
Height: 2 - 5 feet
Sun: Full Shade to Part Shade
Water: Dry to Medium
Bloom color: Pale blue to rich blue with yellow centers
Bloom time: August - September