From the ArcaMax Publishing, Gardening Newsletter:
http://www.arcamax.com/news/gardening/s-160444-771840
Plant type: Perennial
USDA Hardiness Zones: 3a to 9b
Height: 60" to 84"
Spread: 24" to 36"
Exposure: partial shade partial sun to full sun
Bloom Color: Purple, White
Bloom Time: Early fall, Late summer
Leaf Color: Green, Purple
Growth Rate: fast
Moisture: moist to wet
Soil Condition: Alkaline, Loamy, Neutral, Well drained
Form: Upright or erect
Landscape Uses:
Border, Massing, Specimen, Woodland garden
Special Features:
North American native, Fragrant foliage, Naturalizing, Wetlands
plant, Attracts butterflies, Suitable for cut flowers