A small sub shrub with dark blue purple flowers in the late summer to fall.
full sun, light shade
Soil & Site
Prefers well-drained moist soils, but is somewhat tolerant of draught. Will not tolerated wet soggy soils.
die back to the ground in zones 5 and 6, top hardy to zone 7
dark blue flowers in clusters, blooms on current season wood, from late summer to frost
30-36 inches tall
Cut back to the ground in early spring.
A tried growing this plant for a few years in zone #5. I was only able to get 2 or 3 years out of them. They always died back either to the ground or to the base of the plant and than regrew. Dirr says grow this as an herbaceous perennial. (#01)
Notes & Reference
#01-Manual of Woody Landscape Plants (Michael Dirr)