CARYOPTERIS ‘Dark Knight’

Blue Spirea
height: 24-36″
spread: 24-36″
zone: 5
habit: large mound

Silver-gray foliage gives way to deep purplish-blue flowers. Valued for its late summer to fall blooming. Plants may die back completely in a harsh winter. It blooms on new wood so prune in early spring. A butterfly attractor.