SelecTree: Tree Detail

SILK TREE
Albizia julibrissin

Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin Albizia julibrissin

Photo Locations: San Luis Obispo, CA, Cal Poly Campus - San Luis Obispo, CA, Ukiah, CA, Hoyt Arboretum - Portland, OR and Los Angeles County Arboretum - Arcadia, CA

General Notes

This is a fast-growing shade tree tolerant of a variety of conditions that tends to be messy because of the dried legumes and spent flowers. It has a broad, dome-shaped crown, feathery, finely textured leaves, and pink, puffball flowers. Leaves rise, fall, and orient themselves to the sun. Viewing a silk tree at night will reveal a “sleeping tree” with folded leaflets on drooping leaves. This is also true of the monkey pod tree (Samanea saman), as well as several other commonly grown legume trees. Albizia julibrissin has a HPWRA (Hawaii Pacific Weed Risk Assessment) score of 18 (High Risk).

Native to Asia.

Family: Fabaceae

Additional Common Names

SILK TREE, MIMOSA TREE, PINK SIRIS, PERSIAN SILK TREE

Tree Characteristics

Spreading with a Low Canopy.

Rounded, Umbrella or Vase Shape.

Has Partly Deciduous foliage.

Height: 20 - 35 feet.

Width: 20 feet.

Growth Rate: 36 Inches per Year.

Longevity Less than 50 years.

Leaves Bipinnately Compound, Light Green, Bronze or Gold, Partly Deciduous.

Flowers Showy. Pink or Rose. Flowers in Spring or Summer. Has perfect flowers (male and female parts in each flower).

Prolific, Brown Pod, Very Large (Over 3.00 inches), fruiting in Fall, Winter or Summer.

Bark Dark Gray, Smooth.

Shading Capacity Rated as Low to Moderately Dense in Leaf.

Shading Capacity Rated as Low out of Leaf.

Litter Issue is Flowers and Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 4 - 23; H1, H2.

USDA Hardiness Zones 6 - 9.

Exposure Full Sun to Partial Shade.

Moist to Dry Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Highly Alkaline Soil pH.

Seaside Tolerance is Good in Mild Zone.

Pests & Disease Information

Susceptible to Invasive Shot Hole Borer and Caterpillars, Armillaria, Fusarium and Root Rot.

Health, Safety & Environmental Concerns

Branch Strength Rated as Medium Weak

Root Damage Potential Rated as Moderate.

Allergy Health Hazard.

Biogenic Emissions considered Moderate.

Attracts Birds.

Not Deer Palatable.

Special Uses & Values

Shade Tree, Street Tree or Screen.

Cite this tree:
SelecTree. "Albizia julibrissin Tree Record." 1995-2020. Feb 27, 2020.
< https://selectree.calpoly.edu/tree-detail/albizia-julibrissin >

SelecTree Nursery Connection Map
Cal Poly / ESRI