Perennial: Deer and gopher resistant. Drought tolerant. The Cosmo series have a striking appearance with large double, Dahlia-like flowers that can reach up to 5" across. Great for containers or combination planters. Excellent border and cut flower plant. Attracts butterflies and hummingbirds. Bloom time: summer-fall. Bloom color: double; purple. Height: 6-12". Exposure: sun/part shade. Water: moderate. USDA Z5.