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Horse Chestnut

Aesculus hippocastanum

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A large ornamental tree known for its spectacular upright panicles of white flowers with red markings and large spiky seed capsules. Horse chestnuts develop broad canopies and are widely planted in parks and urban landscapes. The shiny brown seeds are conkers, prized by children, though they are toxic if ingested.

Horse Chestnut

Common Problems

Select the problem your Horse Chestnut is experiencing to get a treatment guide.

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Yellow Leaveschevron_right
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Brown Spotschevron_right
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Dropping Leaveschevron_right
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Wiltingchevron_right

Care Guide

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Light
Full sun to partial shade; prefers 6+ hours of sunlight
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Water
Moderate watering; water deeply during dry spells; tolerates occasional flooding
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Soil
Deep, fertile, well-drained loam; tolerates clay and alkaline soils
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Fertiliser
Minimal fertilizer needed; apply balanced slow-release in spring if growth is poor
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Temperature
Hardy deciduous tree; thrives in cool to moderate climates
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Humidity
Moderate; no special humidity requirements

Toxicity

dangerousToxic to CatsdangerousToxic to DogsdangerousToxic to Children

Seeds (conkers) are toxic due to aesculin; can cause gastroenteritis if ingested; keep fruits away from children and pets

Common Diseases

coronavirusLeaf Spotchevron_rightcoronavirusCankerchevron_rightcoronavirusPowdery Mildewchevron_right

Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.