English Holly (Ilex aquifolium)

English Holly

Ilex aquifolium

Glossy spiny leaves hold winter cheer like evergreen jewels. Evergreen broadleaf shrub/tree; common name: English holly.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; full sun promotes maximum berry production, while partial shade prevents leaf scorch in hot climates
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Watering Water deeply when the top 5–7 cm of soil is dry; avoid overwatering to prevent root rot in poorly drained soils
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Temperature Cold hardy to -15°C; prefers cool temperate conditions and tolerates short periods of frost
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Characteristics

  • Leaf: Leathery, glossy dark green leaves with sharp, spiny margins on lower branches; smoother margins on upper mature growth
  • Flower: Small, white, fragrant clusters; dioecious (male and female flowers on separate plants)
  • Fruit: Bright red berries (female plants only) ripen in winter, persisting into early spring
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Care Guide

Watering

Keep soil consistently moist during active growth periods

Fertilization

Apply slow-release acid-loving plant fertilizer once. Fertilizer supports foliage growth and berry production on mature female plants

Composted coffee grounds + eggshell powder:Mix fully composted coffee grounds with crushed baked eggshells; work into topsoil in early spring to boost acidity and calcium levels without causing root burn
Pruning
  • Prune in late winter to shape shrubs or remove dead, damaged, or overcrowded branches
  • Thin dense growth to improve airflow and light penetration for better berry development
  • Avoid heavy pruning of mature trees, as it can disrupt natural form and reduce future flowering
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-confirmed toxic; contains saponins and methylxanthines that cause gastrointestinal and nervous system distress

Humans: Ingestion of berries causes mild gastrointestinal upset; spiny leaves may irritate oral mucosa

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Garden Uses & Culture

Culture: Symbolizes winter holiday cheer and protection in Western European folklore; often used in Christmas decorations

Usage: Ornamental garden plant; cut foliage and berries for seasonal floral arrangements