River Birch
Betula nigra · Deciduous Broadleaf Hardwood
Plant Family
Betulaceae (Birch Family)
Tree Category
Ornamental / Shade Tree
Variety / Cultivar
Species type (commonly cultivated as 'Heritage' or multi-trunk specimens)
Hardiness Zones
USDA Hardiness Zones 4 through 9; highly adaptable to hot, humid summers compared to white birches.
About This Tree
A medium to large deciduous tree often grown as a striking multi-stemmed specimen. It displays an open, rounded to irregular canopy with fine-textured foliage and characteristic curled, exfoliating bark that peels off in papery sheets of tan, salmon, pink, and dark brown shades.
Leaf Characteristics
Simple, alternate arrangement, diamond-shaped to ovate leaves (1.5 to 3.5 inches long) with doubly serrated margins. Medium green above and paler beneath, turning golden yellow in the autumn.
Bark Characteristics
Distinctive exfoliating, papery bark peeling back in curling horizontal plates revealing salmon-pink, cream, and reddish-brown inner bark; older trunks develop dark greyish-brown ridged and furrowed bark at the base.
Growing Information
Origin Region
Eastern and Central United States, commonly found along riverbanks and floodplains.
Growing Season
Spring through autumn; leafs out early in spring, flowers in mid-spring (catkins), and sheds leaves in late autumn after turning yellow.
Sunlight & Water Needs
Full sun to partial shade. High moisture requirement; thrives in wet soils and riverbanks but shows good heat tolerance and moderate drought adaptability once established.
Mature Size
Reaches 40 to 70 feet in height with a canopy spread of 25 to 45 feet. Medium to fast growth rate (up to 2-3 feet per year) with a lifespan of 50 to 75 years.
Special Characteristics
Highly resistant to the bronze birch borer (unlike white birches), tolerant of wet soils, clay soils, and acidic conditions. Highly prized for winter landscape interest due to peeling bark.
Wildlife & Ecology
Provides nesting site and cover for songbirds; seeds from catkins feed various small birds (finches, redpolls, pine siskins) and small mammals. Acts as a larval host plant for various moth and butterfly species.