Twenty teen selection from Mt Cuba of this North American native. Wide horticultural tolerance from full sun to part sun, poor to rich soils, acidic to alkaline soils. Not at its best in extended droughts, but tolerant of short term dry spells. Tall, non flopping stems to 6’ with small composite flowers flowering for a long period in mid to late summer Slow to spread by rhizomes (2’ in 3 years at Mt Cuba). Z4 at least, quart pot