New England aster (Aster novae-angliae)
This wildflower’s native habitat extends well beyond New England. The daisy-like blooms sport purple petals and yellow centers. Flowers appear in late summer, lingering into fall. Stake plants to prevent flopping, or cut stems back by July 1 to reduce height. This aster grows 3 to 6 feet tall, forming a 2- to 3-foot-wide clump. Hardy in Zones 4 to 8, plants self-sow; remove spent flowers to curtail spread. Ripening seeds lure goldfinches to the garden.