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Aesculus glabra var. arguta - Ohio buckeye

Aesculus glabra var. arguta
Ohio buckeye, Fetid buckeye

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This plant carries a 24 months recovery warranty

More information

A small tree or large deciduous bush native to the central United States. This buckeye bears panicles of cream to yellow-green flowers in spring, followed by thorny capsules containing 1 to 3 glossy, toxic seeds in late summer. Its habit is naturally rounded, and its finely dentate, palmate foliage is ornamental. Very hardy, it thrives in well-drained, not too dry soil, in sun or partial shade.
Flower size
13 cm
Height at maturity
5 m
Spread at maturity
4 m
Exposure
Partial shade
Hardiness
Hardy down to -23.5°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, September to November
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Flowering time April to May
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Description

Aesculus glabra var. arguta, the Texas Buckeye, is a small tree that finds its place in natural gardens, informal hedges, and on seasonally flooded banks. Less vigorous than the typical Ohio Buckeye, it displays a rounded habit and offers in spring creamy to yellow-green floral spikes appreciated by insects. It is cultivated in non-scorching sun or partial shade, in well-drained soil, preferably calcareous to neutral. Under these conditions, it can develop beautiful colours in autumn.

Belonging to the Sapindaceae family (formerly Hippocastanaceae), Aesculus glabra var. arguta has the synonym Aesculus arguta. Its natural range covers the western border of Ohio: southeastern Nebraska, Kansas and Missouri, Oklahoma to central and eastern Texas. This species grows there on limestone slopes, in sandy woodland edges and well-drained lowlands, often near watercourses.

It is a bush or small tree that reaches 3 to 7 m in height, with a generally broad and rounded habit. The shoots, initially smooth and grey, bear bark that becomes rougher with age; crushed tissues emit an unpleasant odour. The root system develops a taproot accompanied by lateral roots; the plant self-seeds readily but does not sucker.
The foliage, deciduous, is palmate: the leaf is compound with 7 to 11 leaflets narrow, lanceolate to acuminate, measuring 5 to 16 cm long by 4.5 to 6 cm wide, finely and doubly dentate. The foliage turns yellow, orange-red, even crimson before falling in October. The flowering, which occurs in April-May depending on the climate, appears as terminal erect panicles 12 to 16 cm long, composed of creamy to yellow-green flowers, with 4 petals and prominent stamens; they appear at the same time or just after the leaves. The fruits are light brown capsules, globular, 2.5 to 5 cm in diameter, with a warty, even thorny shell, containing 1 to 3 large, shiny brown seeds; all parts of the plant are toxic to humans and domestic animals. This tree is hardy down to -23°C.

The Texas Buckeye is used as a small woodland edge tree or in a copse, on well-drained soil that remains moist in spring; it tolerates fairly dry summers once established, but foliar scorch is possible in very hot summers. It can be planted near a ditch, stream, or overhanging a bank, with American dry meadow perennials such as Echinacea pallida, Asclepias tuberosa or Gaillardia aristata 'Arizona Red' and grasses like Schizachyrium scoparium and Sporobolus heterolepis. You can also pair it with the red buckeye A. pavia 'Humilis' to extend the flowering period.

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Horse chestnut, Aesculus hippocastanum: planting, growing and care
Family sheet
by Olivier 17 min.
Horse chestnut, Aesculus hippocastanum: planting, growing and care
Read article

Plant habit

Height at maturity 5 m
Spread at maturity 4 m
Habit spreading
Growth rate normal

Flowering

Flower colour yellow
Flowering time April to May
Inflorescence Panicle
Flower size 13 cm
Bee-friendly Attracts pollinators
Fruit colour Brun

Foliage

Foliage persistence Deciduous
Foliage colour medium green
Foliage description Autumn colours vary depending on exposure and soil.

Botanical data

Genus

Aesculus

Species

glabra var. arguta

Family

Sapindaceae

Other common names

Ohio buckeye, Fetid buckeye

Botanical synonyms

Aesculus arguta

Origin

North America

Product reference25076

Planting and care

Plant the Aesculus glabra var. arguta preferably in autumn (October-November) or in late winter, in dappled sun or partial shade, in a non-scorching exposure. Provide it with a well-drained soil, preferably calcareous to neutral, with a silty-sandy or clay-limestone texture; it appreciates moisture in spring, but dislikes both stagnant winter water and very compact soils. Dig a hole two to three times the volume of the root ball, loosen the bottom, mix the excavated soil with a little mature compost and plant without burying the collar. Water after planting and then provide regular waterings for the first two summers; mulch to retain moisture and limit the appearance of herbs. Avoid moving it afterwards: the taproot establishes quickly. A discreet stake for the first or second year secures anchorage. Space the young plants 3 to 4 m apart and avoid excess nitrogenous fertilisers; in the presence of children, remove the potentially toxic fruits.

Planting period

Best planting time March, October
Recommended planting time February to May, September to November

Intended location

Suitable for Woodland edge
Type of use Back of border, Free-standing
Hardiness Hardy down to -23.5°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting spacing Every 350 cm
Exposure Partial shade
Soil pH Neutral, Calcareous
Soil type Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Moist soil, deep, loose, well-drained

Care

Pruning instructions Pruning is limited to a light thinning at the end of winter; remove dead wood and poorly oriented branches.
Pruning Pruning recommended once a year
Pruning time February to March
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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