Winter hardy to USDA Zones 2-6 where it is best grown in medium moisture, well-drained soils in full sun. Tolerates a wide range of soils, including very poor often rocky soils. Established plants have good drought tolerance. Species plants are particularly noted for their superior tolerance for cold temperatures and superior intolerance for heat and humidity. Plants will survive in the wild within the Arctic Circle, but are not recommended for planting in locations south of USDA Zone 6.