The American hornbeam is a native forest understory tree in the Chicago area, making it useful for shady landscapes and naturalized or woodland gardens. New leaves emerge reddish-purple, changing to dark green, then turn yellow to orange-red in the fall, offering a kaleidoscope of color throughout the year. Even in winter, the tree's fluted blue-gray bark with long, sinewy ridges make it a special addition to the landscape. This plant has some cultivated varieties. Go to list of cultivars.
This species is native to the Chicago region according to Swink and Wilhelm's Plants of the Chicago Region, with updates made according to current research.
All common names:
- Residential and parks
Tree or Plant Type:
- Deciduous (seasonally loses leaves)
- Chicago area,
- North America
- Shade tree,
- medium tree (25-40 feet),
- Small tree (15-25 feet)
- Full sun (6 hrs direct light daily),
- Partial sun/shade (4-6 hrs light daily),
- Full shade (4 hrs or less of light daily)
- Zone 3,
- Zone 4,
- Zone 5 (Chicago),
- Zone 6,
- Zone 7,
- Zone 8,
- Zone 9
- Acid soil,
- Moist, well-drained soil,
- Wet soil
- Dry sites,
- Wet sites,
- Alkaline soil,
- Clay soil
- Moderately Tolerant
- Moderately Tolerant
- Fall color,
- Persistent fruit/seeds,
- Attractive bark
Seasons of Interest:
- early winter,
- late winter,
- late summer,
- early fall,
- mid fall
Flower Color & Fragrance:
Shape or Form:
- Game birds,
- Small mammals,
Tree & Plant Care
Plant in the spring. Difficult to transplant due to deep spreading lateral roots.
Tolerates dry, shady sites.
Disease, pests, and problems
Minor leaf spots
Disease, pest, and problem resistance
Tolerant of black walnut toxicity.
Native geographic location and habitat
Native to the eastern half of the United States.
Commonly found in wooded areas as an understory tree.
Bark color and texture
Blue-gray, fluted with long, sinewy ridges.
Leaf or needle arrangement, size, shape, texture, and color
Simple, alternate leaves; 2 1/2 to 5 inches long, double serrated margins with pointed tips.
Leaves emerge reddish-purple, changing to dark green, then yellow to orange-red in the fall.
Flower arrangement, shape, and size
Inconspicuous; tiny male flowers in pendulous catkins in April; small female flowers near the ends of the twigs.
photo: John Hagstrom
Fruit, cone, nut, and seed descriptions
Light brown nutlets, maturing in October, with a three-lobed bract appearing as an umbrella over the nuts; nutlets and bracts in dangling clusters.
Bracts change from light green to yellow in fall.
Cultivars and their differences
These plants are cultivars of a species that is native to the Chicago Region according to Swink and Wilhelm's Plants of the Chicago Region, with updates made according to current research. Cultivars are plants produced in cultivation by selective breeding or via vegetative propagation from wild plants identified to have desirable traits.
Firespire™ American hornbeam (Carpinus caroliniana 'J.N. Upright'): A narrow, upright cultivar with improved red-orange fall color; 20 feet high by 10 feet wide.
J.N. Strain American hornbeam (Carpinus caroliniana 'J.N. Strain'): A vigorous cultivar with improved orange-red fall color.
Native Flame® American hornbeam (Carpinus caroliniana 'JFS-KW6'): An upright form with bright red fall color; 30 feet high by 20 feet wide.
Palisade® American hornbeam (Carpinus caroliniana 'CCSQU'): An upright oval form with yellow-orange fall color; 20 to 30 feet high by 15 to 20 feet wide.