The 'Dark Knight' produced purplish-blue blooms that contrast against its silvery-green foliage. It is a compact variety, growing 2-3' tall and wide. Flowers are pollen rich and beneficial to pollinators.
This variety has a tight, compact growth habit and will reach 2-3' tall and wide at maturity. Its vibrant, purplish-blue flowers attract lots of beneficial pollinators. Blooms will persist from summer through fall.
