Perennial: Heat and drought tolerant. Grown for foliage. Showy silver foliage provides dependable color and texture that looks good all season long. Superb for baskets, containers and window boxes. Wonderful for combination plantings. Tumbles beautifully over rocks, slopes, and banks. Height: 2-3". Spread: 12-18". Exposure: part shade. Water: dry. USDA Z10.