Silk tree
Albizia julibrissin · Fabaceae
📷 Cmapm · Public domain
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around silk tree and prepare for winter.
ID card
- Foliage
- Deciduous, finely divided and feathery
- Flowering
- June to July, pink and white pompom flowers
- Mature size
- 8 m tall, spreading and airy form
- Growth
- Fast to moderate depending on climate
- Hardiness
- Zones 6 to 9 (tolerates -15 °C)
- Origin
- Southeast Asia (Iran, Afghanistan, Himalaya)
- Soil type
- Well-drained, tolerates poor and dry soils
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Water young plants regularly, then space out watering intervals as they mature. Light formative pruning is enough to maintain a balanced shape.
The common mistake
Overloading the soil with fertilizer promotes foliage at the expense of flowering.
The pro's trick
Mulch generously in the first year, keeping mulch away from the trunk, to reduce water stress.
Care
Watering
The silk tree enjoys moderately moist conditions during growth. Water regularly during the first summer after planting to encourage root establishment. Once established, it tolerates drought well thanks to its deep root system. Reduce watering in winter.
Sunlight
Plant the silk tree in full sun for abundant flowering and harmonious form. It needs at least 6 hours of direct daily light. A south or southwest-facing location suits it perfectly.
Soil and Drainage
Choose well-drained, light and permeable soil. The tree adapts to poor, chalky or slightly acidic soils. Avoid compacted or waterlogged soil. Adding compost at planting improves soil structure.
Pruning and Training
Prune lightly after flowering to maintain a balanced and airy shape. Remove dead or poorly positioned branches in late winter. The silk tree does not require severe pruning.
Nutrition
Feed moderately in spring with a balanced fertilizer or one rich in phosphorus to encourage flowering. In naturally fertile soil, feeding remains limited. Stop fertilizing in late summer.
Pests and Diseases
The silk tree is generally robust. Watch for spider mites and aphids in dry climates. Root rot risk increases in overly moist soil. A well-ventilated environment reduces health problems.
Did you know?
Albizia julibrissin earns its nickname of 'silk tree' from its delicate pink pompom flowers, which resemble shredded silk. It's also called the 'silk tree' in France. This tree fascinated European botanists in the 17th and 18th centuries as it traveled from Persia to European gardens, where it symbolized exoticism and oriental elegance.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.