Western Ninebark Pacific Ninebark

Western ninebark is a native deciduous shrub of riparian zones and moist forest edges, named for the flaky, exfoliating bark that appears to have many layers (though it rarely reaches nine). The bark ranges from tan to reddish-brown and peels in thin, papery strips. The leaves are broad, maple-like, with 3-5 lobes and coarse teeth. The small white flowers appear in dense, hemispherical clusters in late spring; the fruits are small, inflated capsules that turn red and persist through fall. The plant reaches 6-15 feet and forms a multi-stemmed, spreading shrub with arching branches.

In Western Washington, Western ninebark is a valuable native shrub for moist, riparian sites where its showy bark, attractive foliage, and delicate flowers provide multi-seasonal interest. The plant tolerates wet to moist soils, partial shade to full sun, and our maritime climate without significant disease or pest pressure. Growth is fast to moderate, reaching mature size in 8-10 years. The flaky bark is especially ornamental in winter when the foliage is gone. The tiny, inflated seed pods age to red and persist, providing visual interest through fall and early winter. For riparian restoration and shade garden plantings, Western ninebark is underutilized; the combination of native origin, adaptability to wet sites, multi-seasonal interest, and low maintenance requirements make it an excellent choice. The vigorous growth and spreading form make it suitable for larger spaces where it has room to express its natural fountain-like silhouette.