Bear Oak (Quercus ilicifolia)

Bear Oak

Quercus ilicifolia

Its holly-like leaves hold tough beauty through harsh winters. Deciduous shrub or small tree; common name: Bear Oak.

Full sun
1/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerant of dry, poor soils; performs best with direct sunlight for most of the day
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Watering Drought-tolerant once established; water deeply only during prolonged dry spells to avoid root rot
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Temperature Hardy to -20°C; tolerates hot, humid summer temperatures without additional cooling
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Characteristics

  • Leaf: Holly-like, leathery, oblong to oval with spiny margins; dark green above, pale below, turns reddish-brown in fall
  • Flower: Inconspicuous male catkins and small female flowers; wind-pollinated
  • Stem/Bark: Smooth gray-brown bark on young stems; becomes furrowed with age
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Care Guide

Watering

Water deeply once weekly during establishment; reduce frequency once mature

Fertilization

Optional diluted compost tea once monthly for young plants. Mature plants require no regular fertilization due to adaptation to poor soils

Composted eggshell powder:Sprinkle a thin layer around the base of the plant; avoid direct contact with stems to prevent burning
Pruning
  • Remove dead or damaged branches in late winter before new growth emerges
  • Thin overcrowded stems to improve airflow and reduce disease risk
  • Shape lightly to maintain desired form; avoid heavy pruning as the species has a naturally compact growth habit
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to tannins; may cause gastrointestinal upset, lethargy

Humans: Contains tannins; large ingestion may cause nausea, vomiting, or diarrhea

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Garden Uses & Culture

Culture: Symbolizes strength and resilience in Eastern North American native landscapes

Usage: Provides habitat and acorn food for birds, deer, and small mammals; used in native garden restoration