White Willow (Salix alba)

White Willow

Salix alba

Graceful pendulous twigs carry parting grief like a soft ribbon. Deciduous tree; common name: white willow.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates windy coastal or open landscapes
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Watering Drought-tolerant once established; water deeply during prolonged dry spells, especially for young trees
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Temperature Hardy to -20°C; prefers cool, moist climates and may struggle in extreme heat without adequate water
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Characteristics

  • Leaf: Narrow lanceolate leaves, silvery-white underside, serrated margins, 5–12 cm long
  • Flower: Inconspicuous catkins (pussy willows), male catkins yellow, female catkins greenish
  • Stem/Bark: Young stems silvery-white, mature bark gray-brown with deep vertical fissures
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Care Guide

Watering

Keep soil consistently moist for young trees; established trees need deep watering every 7–10 days during dry periods

Fertilization

Apply balanced slow-release fertilizer once in early spring. Avoid over-fertilization, as it can lead to weak, brittle growth

Banana peel compost tea:Fully compost banana peels, dilute the resulting tea 1:20 with water, and apply as a root drench to support root health and drought tolerance
Pruning
  • Prune dead, damaged, or crossing branches in late winter to maintain structural integrity
  • Thin crowded inner branches to improve airflow and light penetration
  • Remove suckers growing from the base to prevent unwanted spread
  • Avoid heavy pruning in summer, as it can stress the tree and increase disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; salicin content can cause vomiting, diarrhea, lethargy, and loss of appetite

Humans: Contains salicin (aspirin precursor); large ingestion of bark/leaves may cause stomach pain, nausea, or dizziness

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Garden Uses & Culture

Culture: Symbolizes mourning and remembrance in Western cultural traditions

Usage: Ornamental shade tree; historically used for pain relief via salicin extracted from bark