European Nettle Tree (Celtis australis)

European Nettle Tree

Celtis australis

Its textured leaves and small berries bring quiet, year-round charm. Deciduous tree; common names: European nettle tree, Mediterranean hackberry.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; highly tolerant of urban pollution and reflected heat
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Watering Deep water occasionally during dry spells; drought-tolerant once established
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Temperature Hardy to -10°C; withstands hot, dry Mediterranean summers without significant stress
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Characteristics

  • Leaf: Ovate to lanceolate, serrated margins, rough upper surface, downy grey-green undersides
  • Flower: Small, greenish-yellow, inconspicuous axillary clusters
  • Fruit: Small, dark purple/black drupes ripening in late autumn
  • Bark: Smooth grey-brown when young, developing shallow fissures with age
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Care Guide

Watering

Deep water every 7–10 days during prolonged dry periods; avoid overwatering

Fertilization

Apply balanced slow-release fertilizer once at bud break. Avoid over-fertilizing to prevent excessive soft growth

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around the tree base; avoid direct contact with stems to prevent fungal growth
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin dense canopy to improve airflow and light penetration
  • Shape young trees to establish a strong central leader for structural stability
  • Remove basal suckers regularly to maintain a clean trunk form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: Non-toxic to humans; berries are edible when fully ripe

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental shade tree; berries provide food for birds; wood used for small crafts and tool handles