12"-24". x 18". This Bottle Gentian has clusters of dark blue blooms that do not open in late summer. A wildflower common to moist woods, thickets, and near streams. Plants are slow-growing, but long lived. Native to much of Easter North America.
Prefers morning sun and afternoon shade and moist, well-drained soil, but it can tolerate full sun with sufficient moisture. Resents winter wet. Zones 3-9.