Symphyotrichum cordifolium (Heart-leaved Aster) matures to 3' in height and has light blue flowers. It prefers medium to medium-dry soil conditions, and blooms approximately from September to October. Heart-leaved Aster grows best in partial shade but will tolerate nearly full shade and nearly full sun. Also known as Blue Wood Aster, it has wonderful array of blue flowers attracts butterflies and bees, and also makes an excellent cut flower. Other names are Blue Wood Aster and Aster cordifolius.