Long-lived polycarpic perennial
Source of plant
Bosley Nurseries Inc.
To 5'; hardy to -25 degrees F.; mid to late season blooming; ARS rating 2/3/3. One of the old "ironclads" and still a good plant, with blue-purple flowers and nice foliage. (H. Waterer prior to 1850).
USDA Hardiness Zone
hardiness, winter interest