Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00002129
01/01/98
Hardiness Zones: 3 to 8 Height: 5 ft Spacing: 3 ft Type: herbaceous perennial Flowers: Blue, white, pink
Comments: These tall plants produce distinctive spikes of blue, white or pink flowers. After the initial flower production, side shoots will form flowers. The plant is native to the Eastern U.S. where it can be found in areas with moist soils. Provide a sunny growing area with a moist soil. The plants should not need staking unless they are grown in shade.
Propagation: Division is probably the easiest method.
Cultivars: 'Album' - White flowers. 'Roseum' - Pale pink flowers.
References for Cultivars: White Flower Farm 1997, Ray Wiegand's Nursery 1997.