Winter hardy to USDA Zones 9-10 where it is easily grown as a perennial in average, medium moisture, well-drained soils in full sun to part shade. Best performance is in full sun. Technically plants can be dug in fall, trimmed and overwintered in greenhouses or indoors in sunny cool areas, but many gardeners simply prefer to purchase new plants each spring. Plants may need some staking or other support and should be sited in areas protected from strong winds. Provide consistent water throughout the growing season.