Perennial: Drought, deer and heat tolerant. The Steffi series boasts heat tolerance, an abundance of blooms, and a compact habit. Excellent border and container plant. Has wand-like flower stems that hold the flowers above the foliage. Good cut flower. Attracts butterflies. Long blooming period (spring through fall). Bloom color: white. Height: 18 inches. Width: 20 inches. Exposure: sun. Water: moderate. USDA Z5.