Perennial Herb: Tolerates drought, deer & gophers. Excellent border, rock garden, pot & edge plant. Goes well under garden roses. Combines nicely with Achillea (yarrow). Attracts butterflies & hummingbirds. Blooms: summer-fall. Color: violet with purple-black stems. Size: 1.5-2.5' x 3'. Exposure: sun. Water: moderate/dry. USDA Z5. (syn. S. x sylvestris, S. superba)