12 to 20 ft.
8 to 10 ft.
sun, part shade
USDA zones 4-9
hardy to 6,500 ft.
Grown as a large shrub or small tree, seven-son flower is one of the few shrubs that blooms in September.
In late summer, 6 inch-long clusters of white flowers on the ends of the branches spread their fragrance. Each small whorl of flowers contains 7 tiny flowers (giving seven-son flower its name). Rose colored sepals persist long after flowering has stopped.
It has attractive peeling bark that adds to its appeal through the year. As the tan outer bark sheds, it exposes a darker bark underneath. If allowed to develop as a shrub, the vase-shape may be 10 feet wide.
There is one seven-son flower growing at the Xeriscape Garden. The flowers are quite pretty. The shrub needs pruning when young, otherwise its irregular branching structure makes it appear somewhat messy.
Prune when young to achieve desired shape when mature.