Perennial Herb: Tolerates drought, deer and gophers. Excellent border, rock garden, pot and edge plant. Goes well under garden roses. Combines nicely with Achillea (yarrow). Attracts butterflies and hummingbirds. Blooms: summer-fall. Color: dark violet blue. Growth: 24" x 24". Exposure: sun. Water: moderate/dry. USDA Z5. (syn. S. nemorosa, S. superba)