Albizia julibrissin
al-BEE-zee-uh joo-Iih-BRIS-in

Silk Tree, Mimosa
Fabaceae {Leguminosae) (Legume family)
Origin: Asia, 1918

 

 

©Street Tree Division
City of Los Angeles - Department of Public Works
Bureau of Street Services

Species characteristics:
Form -Deciduous. Open, lacy and graceful, spreading tree which grows rapidly to 40' with equal width.

Trunk -Bark is smooth and gray.

Foliage -Fern-like, paripinnately compound leaves that fold at night are 6 -15" long. Each leaf has 5 - 12 evenly paired pinnae 2 - 4" long with leaflets 1/4 - 5/8" long. Distinguishable from other bipinnately compound leaflets, by a pair of leaflets borne on the tip, forming a vee.

Flowers/fruit -Flowers are very showy in late summer when the 1" rounded clusters of watermelon pink, grouped at ends of twigs resemble fluffy pincushions. The light brown fruits, 1" wide and 5 to 8" long, are flat, pointed oblong pods containing several flat, shiny beanlike brown seeds which mature in summer.

Significant pest problems are Mimosa webworm and mealybugs, Mimosa wilt.

Site suitability:

Sunset zones: 2 - 23.

Clearances -Suitable for 5' minimum parkways, medians or cutouts. Suitable under utility lines for many years due to slow growth and spreading habit.

Good for street sides, medians, parks and lawns.

Culture considerations:

Thrives best under hot summer conditions. With ample water grows fast. With reduced irrigation grows slowly and foliage turns yellowish. Excellent open shade tree. Needs staking. Needs pruning to develop high-headed tree. Low spreading and heavy flower droppings may cause additional maintenance.