Albizia julibrissin

silk tree, Persian silk tree, silky acacia, mimosa tree, pink siris

Broad-headed, deciduous tree, native to West- and East Asia, from Iran to Japan. Fern-like, bipinnately compound leaves. Fragrant, pink, 4 cm long, pom-pom-like flowers in summer, followed by flat seed-pods (10-15 cm long). Albizia julibrissin is widely grown as an ornamental tree, but has become invasive in some parts of the world. Once established, it is difficult to eradicate due to its ability to re-sprout readily and the longevity of its seed.

Prefers a sunny position in well-draining soil. Tolerates moderate frosts (zones 8-12), and a wide range of soils, including sand and clay. Prone to Fusarium wilt, a fatal fungal disease. Reasonably wind-hardy and drought-tolerant once established.

Albizia julibrissin with its relatively flat umbrella-shaped crown and delicate, deciduous foliage, is a graceful tree suitable as a shade tree, and perfect for flower display in summer. Since the flowers are positioned above the foliage, the tree would suit a spot where you can look down on the canopy.