Stokes' aster is not a true aster, and it does not behave like one. Stokesia 'Honeysong Purple' flowers in midsummer rather than fall, and the blooms are large and fringed, closer to a cornflower than a daisy. It grows 12 to 15 inches tall and 10 to 12 inches wide in full sun, hardy from Zone 5 through Zone 8.
The color is an intense royal purple with a hint of red toward the center, and the flowers stand well above the foliage on sturdy stems. Bloom runs for weeks in mid to late summer, and deadheading keeps it going. They cut well and last in a vase.
The foliage is strap-shaped and evergreen through winter in the milder end of the range, forming a low basal rosette that stays presentable after the flowers finish.
Stokes' aster is a southeastern native and handles heat and humidity better than most perennials, which is where it earns its place. It needs well-drained soil, and winter wet is the main thing that kills it, so avoid heavy clay and low spots that stay saturated. Butterflies come to the flowers through the bloom.