Silver Tree (Leucadendron argenteum)

Silver Tree

Leucadendron argenteum

Silvery foliage shimmers like frosted metal, a striking evergreen shrub for Mediterranean gardens. Common name: Silver Tree.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full sun for optimal silvery foliage color and flowering; partial shade may reduce leaf brightness
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Watering Water deeply but infrequently; allow top 15–20 cm of soil to dry completely between waterings to prevent root rot
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Temperature Tolerates light frosts down to -2°C; thrives in warm, dry summers and cool, wet Mediterranean-style climates
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Characteristics

  • Leaf: Silvery lance-shaped leaves covered in dense soft hairs, arranged in whorls around upright stems.
  • Flower: Dioecious; male plants bear yellow cone-like inflorescences, female plants produce small greenish cones that mature into woody seed heads.
  • Stem: Slender upright stems with smooth grey bark that becomes rough and fissured with age.
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Care Guide

Watering

Water every 7–10 days during dry spells; reduce watering during natural rainfall

Fertilization

Apply a low-nitrogen slow-release fertilizer once at the start of the growing season. Do not over-fertilize, as high nitrogen levels can diminish the plant's characteristic silvery foliage

Eggshell powder top-dressing:Crush dried eggshells into a fine powder; sprinkle lightly around the base in early spring, avoiding direct contact with stems to prevent irritation
Pruning
  • Prune immediately after flowering to maintain a compact shape and encourage new growth.
  • Remove dead, damaged, or crossing branches to improve airflow and reduce disease risk.
  • Thin dense leaf whorls to allow light penetration to inner stems and promote uniform growth.
  • Avoid heavy pruning of mature trees, as they have limited regrowth capacity from old wood.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-listed non-toxic; no adverse effects reported for cats

Humans: No known toxic effects for humans; safe for handling and cut foliage use

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Garden Uses & Culture

Culture: Symbolizes resilience and conservation of the Cape Floristic Region's unique biodiversity

Usage: Ornamental garden plant; cut foliage for floral arrangements and decorative displays