Perennial Herb or Subshrub: A sturdy growth gives it adaptability to a wide range of climate conditions. A great sub for white alyssum. Good for pots, baskets, beds or as a ground cover. Provide ample water in full sun but avoid overwatering in shade. Exposure: sun/part shade. Bloom color: white. Height: 3-5". Spread: 12-18". USDA Z9.