A genuine biodiversity workhorse, ninebark is documented to host at least five named moth species - including the striking Io moth - and draws both short- and long-tongued bees including mining bee specialists, though it's worth knowing this species is explicitly not deer resistant.
Species Overview
Physocarpus opulifolius, or common ninebark, is a fast-growing, upright deciduous shrub native to central and eastern North America, reaching 5 to 10 feet tall with an arching, fountain-like habit. Clusters of white to pink, spirea-like flowers appear in late spring, followed by drooping clusters of reddish-pink seed capsules, with the shrub's exfoliating bark revealing layered reddish to light brown inner bark for winter interest.
Application
Mixed shrub borders, hedges, and screens - fast growing, year-round interest
Erosion control on banks and slopes
Larval host habitat for the Io moth and four other named moth species
Habitat islands and privacy plantings
Growing Conditions / Specification Data
Light: Full Sun to Part Shade
Soil/Moisture Tolerance: Average, slightly acidic, dry to medium moisture, well-drained soils; tolerates clay
Drought Tolerance: High
Flood Tolerance: Moderate - The species is adaptable to a very wide range of soil and site conditions, from moist to dry, acid to alkaline, and gravelly to heavy clay.
Plant Type: Shrub
Mature Height: 4-8 ft.
Fall Color: Yellow
Bloom Color / Period: Pink, White; April-June
Wetland Indicator Status: NI (No Indicator) - see flags
IMPORTANT: not deer resistant - protect newly installed shrubs with wire fencing or netting in deer-pressured areas. Can gain 2 ft. or more in height in a single year; blooms on old wood, so prune immediately after flowering.
