Bitternut Hickory (Carya cordiformis)

Bitternut Hickory

Carya cordiformis

Its bark is textured like cracked leather, bearing bitter nuts for wildlife. Deciduous hardwood tree; common name: swamp hickory.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; young trees tolerate filtered woodland light, mature trees thrive in open full sun
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Watering Deep, infrequent watering to establish root systems; drought-tolerant once fully mature
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Temperature Extremely cold-hardy; withstands harsh winter temperatures and summer heat in temperate regions
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Characteristics

  • Leaf: Pinnately compound with 7–11 lanceolate leaflets; bright green summer foliage, golden yellow autumn color
  • Flower: Monoecious; drooping male catkins release pollen, small red female spikes grow at branch tips
  • Bark: Gray, shallowly fissured with interlacing ridges as the tree matures
  • Fruit: Round, thin-shelled nuts with a bitter, inedible kernel
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Care Guide

Watering

Water deeply every 7–10 days during prolonged dry spells

Fertilization

Apply balanced slow-release fertilizer once in early spring. Use low-nitrogen fertilizer to promote root and fruit development without excessive foliage growth

Composted banana peel tea:Steep fully composted banana peels in water for 3 days; dilute 1:20 with water for root drench to avoid nutrient burn and odor
Pruning
  • Remove dead, diseased, or crossing branches in late winter to improve air circulation
  • Thin crowded inner branches to increase light penetration to lower foliage
  • Trim suckers at the base to direct growth to the main trunk and maintain tree form
  • Avoid heavy pruning, as hickories heal slowly from large cuts
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no known adverse effects from contact or ingestion

Humans: Non-toxic; bitter nuts are unpalatable but do not cause negative health effects in small ingestions

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Garden Uses & Culture

Culture: Symbolizes resilience and wildlife support in North American forest ecosystems

Usage: Hardwood used for furniture, tool handles, and firewood; nuts provide food for squirrels and birds