Prairie Ninebark (Physocarpus opulifolius), also known as Eastern Ninebark or Common Ninebark, is a hardy, deciduous shrub native to much of eastern and central North America. It typically grows 5 to 8 feet tall and wide, forming an upright, arching shape with attractive, exfoliating bark that peels in thin layers to reveal reddish-brown inner bark—hence the name "ninebark." Its lobed, maple-like leaves are dark green in summer and turn yellow or bronze in fall. From late spring to early summer (May to June), Prairie Ninebark produces dense, rounded clusters of small white to pale pink flowers that are highly attractive to pollinators.
This shrub thrives in full sun to partial shade and is highly adaptable to a range of soil types, including clay, loam, and rocky or sandy soils. It prefers moist, well-drained conditions but is also tolerant of drought, poor soils, and urban pollution. Hardy in USDA Zones 2 through 8, Prairie Ninebark is an excellent choice for naturalistic landscapes, erosion control, rain gardens, and mixed shrub borders. It spreads slowly by suckering and can be rejuvenated by periodic pruning.
Ecologically, Physocarpus opulifolius supports a wide variety of native insects. Its flowers attract bees, flies, and butterflies, while the foliage serves as a host plant for several species of moths, including the Darapsa myron (Virginia Creeper Sphinx) and Cresera annulata. Birds and small mammals use its dense branches for shelter and may feed on its small red seed capsules in late summer and fall. Its deep root system helps stabilize streambanks and slopes, making it especially valuable in restoration projects and riparian buffers.
