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Big Buckeye

Aesculus flava (ES-kew-lus FLAH-vah)

Family: Sapindaceae Native Canopy (>40 ft)

Yellow buckeye is a deciduous tree in the maple family (Sapindaceae), native to eastern North America. It is primarily found in the southern Appalachian mountains and sometimes in the more moderate and moist upland of the Piedmont of North Carolina. In nature, it can grows up to nearly 6500 feet in elevation in moist forests and seepy cove forests. Yellow Buckeye is primarily found in habitats characterized by moderate temperatures and high precipitation amounts in the Piedmont. Typically, the tree will grow to 60 feet high, but in the mountains, it can grow to 90 feet tall and 40 feet wide or more with an oval crown and a 3-foot diameter trunk. In the lowlands, it is typically a smaller tree or shrub. Yellow buckeye performs best in full sun in moist, rich, well-drained, deep, and slightly acidic soils. It doesn't care for poor, clay or dry soils but will tolerate brief flooding and urban conditions. The foliage can scorch and depreciate in dry conditions. Also, remember that this is a taprooted tree that is difficult to transplant once established. The palmately compound leaves arrive early in the spring, are attractive and have better disease resistance than other buckeyes. The bark is sometimes exfoliating. In spring, erect 6-inch panicles of creamy yellow flowers are quite showy and are followed by 2-to-3-inch fruits containing 1 to 3 seeds in the fall. As with most nut trees, they can produce litter from fruits, twigs and leaves. This tree can be used in large settings such as parks, municipal grounds, or large yards for shade. It will do well planted along streams or ponds, in naturalized areas or open woodland settings. Fire Risk: This plant has a low flammability rating. Insects, Diseases, or Other Plant Problems: Buckeye lacebug, Japanese beetles, bagworms, and borers are infrequent but potentially troublesome. Not nearly as susceptible to leaf scorch, leaf spot, leaf blotch, and powdery mildew as other buckeyes but can still occur. Disease problems tend to be less severe than those for Ohio buckeye.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 82 attributes.

How it fits the guild

Guild layer 1 - Canopy (>40 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Often confused with Aesculus x arnoldiana Aesculus x marylandica 'Homestead'
Similar, less problematic Aesculus glabra

Full plant profile

Growing Conditions
Plant type
Native Plant; Poisonous; Tree
Life cycle
Woody
USDA zones
3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
High Organic Matter; Loam (Silt); Sand
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
Available space
24-60 feet; more than 60 feet
NC region
Mountains; Piedmont
Mature size
Height: 40 ft. 0 in. - 60 ft. 0 in. | Width: 30 ft. 0 in. - 40 ft. 0 in.
Growth rate
Slow
Maintenance
Medium
Canopy layer
1 - Canopy (>40 ft)
Form & Appearance
Habit / form
Erect; Open; Oval; Rounded
Texture
Coarse
Foliage
Deciduous
Leaf color
Green
Leaf type
Compound (Pinnately , Bipinnately, Palmately)
Leaf arrangement
Opposite
Leaf shape
Elliptical
Leaf margin
Serrate
Leaf value
Showy
Leaf size
3-6 inches long, 1-3 inches wide
Hairs present
No
Leaf detail
Palmately compound leaves are 9 to 15 inches long with 5 to 7 oval pointed leaflets that are 4 to 6 inches long and 1-3 inches wide. The stem is as long as the leaflet. They have a wedge-shaped base, long pointed tip, sharply serrate margins with excellent dark green color and lighter undersides. The fall color is yellow and orange.
Fall color
Gold/Yellow; Orange
Flower color
Cream/Tan; Gold/Yellow; Red/Burgundy
Flower value
Showy
Flower form
Panicle
Flower shape
Tubular
Flower size
3-6 inches
Flower detail
Individual flowers are yellow to red in color with 4 petals, stamens shorter than the petals, styles longer than the petals and curving upward. Form erect panicles up to 7 inches long and 3 inches wide in late spring (April-May). In North Carolina, the flowers bloom from April to June.
Bloom time
Spring; Summer
Fruit color
Brown/Copper; Red/Burgundy
Fruit type
Capsule
Fruit size
1-3 inches long, 1-3 inches wide
Fruit detail
Leathery round to oval smooth capsule on a stout terminal stalk with 1 to 3 shiny, dark brown nuts (buckeyes), 1 1/2 to 2 inches wide with a pale scar. Matures in late summer to fall; August to September in North Carolina.
Bark color
Light Brown; Light Gray
Bark detail
Smooth, light grayish brown developing to large flat scales and plates.
Stem color
Brown/Copper; Green
Stem detail
Stout brown stems with orangish lenticels. Terminal buds are orangish-brown and large (1/2 to 3/4 inch) with a sharp point, lateral buds are much smaller. Buds are non-sticky and covered with smooth overlapping scales.
Wildlife & Ecology
Native status
Native
Origin
Eastern USA
Distribution
AL , DC , GA , IL , IN , KY , MD , MS , NC , NJ , OH , PA , SC , TN , VA , WV
Wildlife value
The nectar from the flowers attracts hummingbirds, bees, butterflies, and other pollinating insects. Nuts attract squirrels.
Attracts
Bees; Butterflies; Hummingbirds; Pollinators; Small Mammals
Play value
Attractive Flowers; Attracts Pollinators; Shade; Wildlife Cover/Habitat; Wildlife Food Source
Food & Medicine
Edible parts
Seeds
Harvest time
Fall
Fruit type
Capsule

Edibility

Use caution. The seed is rich in saponins that, although poisonous, are poorly absorbed by the human body and so most pass through without harm. Saponins are quite bitter and can be removed by carefully leaching the seed or flour in running water. However, it is not advisable to eat large quantities of food that contain saponins.

Uses (ethnobotany)

The soft, close-grained wood is used for wooden ware, firewood, and pulpwood. Native Americans made a nutritious food from the seeds, after removing the toxic element by roasting and soaking them. People used to carry the nuts for luck.

Landscape Use
Landscape location
Naturalized Area; Pond; Riparian; Woodland
Landscape theme
Native Garden; Pollinator Garden; Rain Garden
Design feature
Flowering Tree; Shade Tree
Garden tags
#poisonous #hummingbird friendly #showy leaves #squirrel friendly #nectar plant #deciduous #fall interest #deer resistant #nuts #pollinator plant #flowering tree #Braham Arboretum #shade tree #NC native #native tree #showy flowers #problem for cats #problem for children #problem for dogs #problem for horses #woody #fruits early fall #food source hard mast fruit #piedmont #food source nectar #food source pollen #bee friendly #partial shade tolerant #red flowers #small and large mammals #flowers late spring #flowers early summer #mountains #fruits summer #spring interest #food source summer #rich soils #well-drained soil #butterfly friendly #neutral pH #yellow flowers #summer interest #deciduous tree #full sun tolerant #acidic soils tolerant #native garden #high maintenance #sandy soils tolerant #loamy soils tolerant #moist soil #Piedmont Mountains FACU #Coastal FACU #spring flowers #Audubon #flowers mid-spring #showy fruits #disease resistant #fire low flammability #wildlife friendly #woodland #HS304
Problems & Resistance
Insect problems
Lace Bugs; Japanese Beetle; Bagworms in Ornamental Landscapes
Problems
Messy; Poisonous to Humans; Problem for Cats; Problem for Children; Problem for Dogs; Problem for Horses
Resistant to
Black Walnut; Deer; Diseases; Fire
Propagation
Seed
Fire risk
low flammability
Poison severity
High
Poison parts
Fruits; Leaves; Seeds
Poison symptoms
Muscle weakness and paralysis, dilated pupils, vomiting, diarrhea, depression, paralysis, and stupor. It can cause death in humans, livestock and pets.
Toxic principle
Glycoside aesculin, saponin aescin, possibly alkaloids in spring leaves and fall seeds.
Contact dermatitis
No
Toxicity summary
High severity poison; parts: Fruits; Leaves; Seeds

Planted at Hunnicutt

Nobody’s planted this one yet.