Also known as blanket flower, Gailliardias are native to the Southwestern United States that produce profuse, colorful mounds of long-lasting flowers through early fall. The Arizona Sun variety grows 8-10 inches tall and about a foot wide. A short-lived perennial, gailliardia is more likely to survive winter if it is cut back to six-inch clumps in late summer or early fall. It can also be divided every 2-3 years in spring or early fall.