Zones: 4 to 9
Size: To 4' tall and wide
Growth Rate: Moderate
Exposure: Sun, Filtered Sun
Moist, sunny habitat. Dark green stems, upright, forming a vase-shaped clump. Cut back old foliage in early spring.
'Spiralis' - twisted stems, 10 to 14" tall, zones 5 to 11.
'Big Twister' - upright spiraling foliage, 18 to 24"tall and wide, zones 5 to 11
Published in Sp. Pl. 1: 326 in 1753.