caryopteris x clandonensis 'dark knight' (bluebeard, blue mist spirea) gold

caryopteris x clandonensis 'dark knight' (bluebeard, blue mist spirea) golddeep blue purple flowers on the ends of the new growth in late summer rounded, mounding shrub with fragrant, bluish leaves with silvery undersides attractive to hummingbirds, butterflies, and beneficial insects used as cut flowers bloom time: july to september zone 5 height 50 60cm spread 50 60cm colour deep blue caryopteris is best treated as a woody perennial, i. e., prune heavily in winter to promote vigorous growth and good flowering grows best in

dense clump of medium-green foliage

tubular flowers

medium purple

in full sun to light shade

gold-centered with wide dark green margins

relatively slow-growing

clumps need to be divided every 2-3 years to maintain their appeal

overlapping petals surround a central

prune in late winter to early spring to make room for new growth

felted foliage Insignificant

cherry-red flowers appear on square stems just above foliage

height 5-7m