Like Dichroa febrifuga it blooms in broad domes of small fertile flowers of deep blue. What immediately distinguishes it are the nearly black stems on all new growth. This shrub is dense, upright and robust, reaching over six feet. Evergreen and rather tender, it will thrive in most parts of Zones 8-10, but shoud be given a sheltered position. Best planted in sun or shade. It's best to prune to around half size after flowering to maintain vigour and flower performance next summer. Tolerant of dry spells, more so than it's sisters, the hydrangeas. Yellowing of foliage though is a sign that it needs more water, and very likely a little general fertiliser.