Silk Tree, Mimosa
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.
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.
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.