Betula nigra

River birch is a native deciduous, upright, flowering tree with cinnamon-brown, exfoliating bark and yellow fall foliage that tends to drop off the tree quickly. A member of the Betulaceae (birch) family, it is the only native birch that does well in low elevations of the south. Betula is Latin for birch and describes a genus of about 60 species of deciduous trees and shrubs found in many gardens and landscapes throughout the northern hemisphere.

River birch prefers wet sites and does best in moist, acidic, sandy, or rocky, well-drained loam in full sun to part shade. The best foliage color occurs in full sun. River birch is perhaps the most culturally adaptable and heat tolerant of the birches. This species has been known to tolerate flooded conditions for extended periods of time. For this reason, it is naturally found in riverbanks, streambanks, and floodplains. It is also quite wind resistant. In the landscape, keep the soil consistently moist and consider using soaker hoses and bark mulches to keep the root zones cool and moist. It needs little pruning, but if necessary, you can prune during the dormant season. Do not prune in winter or spring when the sap is running because it will bleed. 

The bark of young river birch trees is reddish-brown with a papery appearance. The bark peels away year-round, and the inner bark varies in hue from light to dark. The papery bark layers remain attached, giving it an attractive ragged appearance.  

Site the tree as a specimen or small grouping for shade or screening in the lawn, a rain garden, or naturalized, woodland, or riparian areas. 

Insects, Diseases, or Other Plant Problems: Although river birch is resistant to the bronze birch borer, which infects and kills trees, aphids, leaf miner, and birch skeletonizer may occur. Watch for leaf spot problems. River birch tends to shed interior leaves during summer droughts and dry periods and can become stressed by summer heat and humidity. It also tends to drop a lot of twigs, making it better suited for less manicured areas of the landscape.

VIDEO created by Andy Pulte for “Landscape Plant Identification, Taxonomy and Morphology” a plant identification course offered by the Department of Plant Sciences, University of Tennessee.