Vernonia lettermanii 'Iron Butterfly' | Iron Butterfly Vernonia
Upright perennial boasts nonstop magenta-purple blooms above the lush needle thin, fine green foliage in late summer. Attracts butterflies to the garden. Once established it tolerates dry soil and drought conditions. Disease resistant. Good massed in borders.
Exposure: Full Sun Bloom Time: Summer Height x Width: 24-36" x 36" Hardiness: -34°C to -29°C USDA Zone: 4