Siris Tree (Albizia lebbeck)

Siris Tree

Albizia lebbeck

Fluffy powder-puff blooms carry soft, sweet scent. Deciduous flowering tree; common names: Siris Tree, Woman's Tongue Tree.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Thrives in full sun to partial shade; prefers direct morning sun and protection from harsh midday sun in extreme heat
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Watering Water deeply when the top 5–10 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Tolerates warm temperate to tropical climates; sensitive to frost and will suffer damage below 10°C
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Characteristics

  • Leaf: Bipinnate compound leaves with small oval leaflets that fold inward at night
  • Flower: Round, fluffy powder-puff blooms in creamy white to pale yellow with a sweet fragrance
  • Stem/Bark: Smooth grey-brown bark with a straight, sturdy trunk and spreading branches
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Care Guide

Watering

Keep soil evenly moist during active growth periods

Fertilization

Feed with balanced, slow-release fertilizer every 2 weeks. Discontinue fertilization in autumn and winter when growth slows

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 with water, and apply as a root drench to support flowering and foliage health
Pruning
  • Remove dead, damaged, or crossing branches in late winter to promote new spring growth
  • Thin crowded inner branches to improve airflow and light penetration through the canopy
  • Trim to maintain desired canopy shape; avoid heavy pruning during active growing season to prevent stress
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains mimosine which may cause vomiting, diarrhea, lethargy, and loss of appetite

Humans: Ingestion of large amounts may cause mild gastrointestinal irritation including nausea and diarrhea

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Garden Uses & Culture

Culture: Symbolizes peace and friendship in some South Asian cultural traditions

Usage: Ornamental shade tree for urban parks and gardens; wood used for furniture, fuel, and traditional medicine in some regions