American Hornbeam
Carpinus caroliniana · Deciduous Broadleaf Hardwood
Plant Family
Betulaceae
Tree Category
Ornamental / Understory / Shade Tree
Variety / Cultivar
Wild Type / Straight Species
Hardiness Zones
USDA Hardiness Zones 3a through 9b
About This Tree
A small-to-medium deciduous understory tree with a distinctive muscle-like, fluted trunk and smooth gray bark. Features a rounded to wide-spreading canopy with delicate, fine-textured horizontal branching and dark green double-serrate leaves.
Leaf Characteristics
Simple, alternate arrangement, 2 to 4 inches long, ovate-oblong shape with doubly serrate margins and prominent parallel veins. Medium to dark green in summer turning brilliant orange, scarlet, and yellow in autumn.
Bark Characteristics
Distinctive smooth, bluish-gray bark with pronounced irregular vertical ridging that resembles tight, flexed muscle tissue, giving rise to its common name 'Musclewood'.
Growing Information
Origin Region
Eastern North America, ranging from Minnesota and Quebec south to Texas and Florida
Growing Season
Leafs out in early spring; flowers in mid-to-late spring; produces hop-like nutlets by late summer; displays brilliant red-orange fall color before winter dormancy.
Sunlight & Water Needs
Thrives in Full Sun to Full Shade (prefers partial shade in hot climates); requires consistent moisture and organic-rich soil, moderate drought tolerance once fully established.
Mature Size
Reaches 20 to 35 feet in height with a spread of 20 to 30 feet; slow to moderate growth rate (12-24 inches per year); lifespan often exceeds 75 to 100+ years.
Special Characteristics
Extremely dense and hard wood, exceptional shade tolerance, outstanding fall foliage color, smooth muscle-like ornamental bark, high tolerance to wet soil conditions and occasional flooding.
Wildlife & Ecology
Seeds and catkins provide vital food for songbirds, wild turkeys, grouse, and small mammals like squirrels and chipmunks. Serves as a larval host plant for Eastern Tiger Swallowtail and Io moths.