Ohio Buckeye
Aesculus glabra
A medium native tree with palmate compound leaves, spiny husks holding glossy brown 'buckeye' seeds, and foliage that smells unpleasant when crushed.
- Light
- Full sun to part shade
- Water
- Consistently moist soil
- Difficulty
- Moderate
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Overview
Ohio buckeye is the state tree of Ohio and a familiar medium-sized hardwood of the central United States. It is among the first trees to leaf out in spring and the first to drop its leaves in fall, often after an early orange-red color show.
It is best known for its shiny mahogany-brown seeds marked with a pale 'eye' that resemble the eye of a deer — carried by many as a good-luck charm. All parts are toxic if eaten, and the crushed foliage and twigs give off a distinctly fetid odor, earning it the name 'stinking buckeye.'
How to identify it
Palmate leaves and spiny husks are diagnostic:
- Leaves opposite, palmately compound with usually 5 (sometimes 7) leaflets radiating from a central point; smell unpleasant when crushed
- Flowers upright greenish-yellow clusters (panicles) in spring
- Fruit rounded husk with short, soft spines/prickles enclosing 1-2 glossy brown seeds with a tan 'eye'
- Bark gray, becoming scaly and corky with age; foul-smelling when scratched
- Form rounded crown 30-50 ft tall, often branching low
Care & growing
Best with steady moisture and some shade in hot regions.
- Light: Full sun to partial shade
- Water: Prefers consistently moist soil; leaf scorch and early defoliation occur in drought
- Soil: Rich, moist, well-drained loam; common on limestone bottomlands
- Temperature: Hardy in USDA zones 3-7
- Feeding: Rarely needed in good soil
- Propagation: From fresh seed sown in fall (do not let seeds dry out); needs cold stratification
Habitat & origin
Native to the central and midwestern United States, centered on the Ohio and Mississippi River valleys from Pennsylvania and Michigan to Kansas, Oklahoma, and Texas. It grows in moist bottomlands, riverbanks, and rich woods, often on limestone soils.
It is planted as an ornamental and is celebrated culturally in Ohio, where the seeds and the tree are state symbols.
Uses & benefits
Grown as a native ornamental and shade tree for early spring leaf-out, flowers, and fall color, and valued as a wildlife and pollinator plant.
The glossy seeds are popular good-luck charms, though all parts are poisonous and must not be eaten. Indigenous peoples processed the toxic seeds to leach out the poisons for food and crushed them to stun fish. The soft, light wood has been used for artificial limbs, crates, and pulp.
Frequently asked questions
Are buckeye seeds poisonous?
Yes — the seeds and all parts contain toxic glycosides and saponins and are poisonous to people and livestock if eaten.
Why is it called 'stinking buckeye'?
The crushed leaves, twigs, and bark give off an unpleasant, fetid odor.
How do I tell it from horse chestnut?
Ohio buckeye usually has 5 leaflets and softly spiny husks; common horse chestnut has 7 leaflets and stouter spines and larger seeds.
Why do the leaves drop so early?
It is sensitive to drought and heat, often scorching and shedding leaves in late summer, and is naturally one of the first trees to go dormant.
Ohio Buckeye guides
In-depth guides for identifying, growing, and caring for Ohio Buckeye.
