Persian Silk Tree (Albizia julibrissin)

Persian Silk Tree

Albizia julibrissin

Its fluffy pink blooms look like summer clouds stitched with silk. Deciduous flowering tree; common names: Persian silk tree, pink siris.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Thrives in full sun for optimal flowering; tolerates partial shade in hot, arid regions
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Watering Water deeply but infrequently; drought-tolerant once established, avoid waterlogged soil
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Temperature Hardy to -10°C; prefers warm temperate climates, protect young trees from prolonged heavy frost
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Characteristics

  • Leaf: Bipinnate compound fern-like leaves that fold inward at night or during rainfall
  • Flower: Dense, pom-pom shaped pink inflorescences with long, silky stamens that emit a sweet fragrance
  • Stem/Bark: Smooth gray-brown bark; young stems covered in fine, soft hairs
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Care Guide

Watering

Water deeply every 7–10 days during active growth; allow top 15 cm of soil to dry between waterings

Fertilization

Apply a balanced slow-release fertilizer once in early spring. Do not fertilize during dormancy in late autumn and winter

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 with water, and apply as a root drench; avoid using uncomposted peels to prevent odor and pest issues
Pruning
  • Remove dead, damaged, or crossing branches in late winter before new growth emerges
  • Thin overcrowded canopy branches to improve air circulation and light penetration
  • Trim suckers growing from the base to maintain the tree's desired shape
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed toxic; contains alkaloids that may cause vomiting, diarrhea, lethargy, and loss of appetite

Humans: Ingestion of large amounts may cause mild gastrointestinal upset including nausea and abdominal pain

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Garden Uses & Culture

Culture: Symbolizes love and friendship in some Middle Eastern cultures; associated with relaxation due to its night-folding leaves

Usage: Ornamental shade tree for gardens and parks; lightweight wood used for small crafts and tool handles