Silk tree, Mimosa tree, Persian silk tree, Pink siris
Albizia julibrissin
🌿 Morphology
🌞 Growing conditions
🌍 Origin and family
🌾 Uses
Warning: Despite the care taken in writing this sheet, it is essential to cross-reference sources before using or consuming any plant. When in doubt, consult a qualified professional
Permaculture uses
Nitrogen fixer, soil improver, erosion control, bee forage, ornamental tree, fodder for livestock. The flowers attract pollinators and provide nectar for honey production. The seed pods and leaves can be used as green manure to enrich the soil. It provides light shade, allowing for understory planting. Some cultivars are more cold-hardy or have different flower colors.
Permapeople description
Sometimes named Albizia julibrisin (with a single S). Sometimes incorrectly spelled Albizzia (with double Z).
Botanical description
Albizia julibrissin is a small deciduous tree with a spreading, umbrella-like crown. It typically grows to a height of 20-40 feet. The bark is smooth, greenish-gray when young, becoming darker and furrowed with age. The leaves are bipinnately compound, giving them a fern-like appearance. The flowers are pink, fragrant, and arranged in pom-pom-like clusters. They appear in summer and are highly attractive to pollinators. The fruit is a flat, brown seed pod. The plant is native to Asia.
Companion planting
Generally considered a good companion plant due to its nitrogen-fixing capabilities. Avoid planting near walnut trees, as Albizia julibrissin can be sensitive to juglone.
Propagation methods
Seed (requires scarification), softwood cuttings, root cuttings, grafting.
History and traditions
Albizia julibrissin has been cultivated for centuries in Asia for its ornamental value and medicinal properties. In traditional Chinese medicine, the bark and flowers are used to treat anxiety, insomnia, and depression. It was introduced to Europe in the 18th century and to North America in the 19th century.
Usage calendar
Flowering: summer (June-August). Seed collection: fall. Planting: spring or fall. Pruning: late winter or early spring.