Perennial Herb: Tolerates drought, deer & gophers. Excellent border, rock garden, pot and edge plant. Goes well under garden roses. Combines nicely with Achillea (yarrow). Attracts butterflies and hummingbirds. Bloom time: summer-fall. Bloom color: white. Ht: 18". W: 18". Exposure: sun. Water: moderate/dry. USDA Z5. (syn. S. nemorosa, S. superba)