Weeping Silk Tree, Weeping Mimosa Tree, Pink Siris 'Ishii Weeping'

Albizia julibrissin

Family: Mimosaceae
Genus: Albizia (al-BIZ-ee-uh) (Info)
Species: julibrissin (joo-lih-BRISS-in) (Info)
Cultivar: Ishii Weeping
Additional cultivar information:(aka Pendula)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


30-40 ft. (9-12 m)


10-12 ft. (3-3.6 m)

12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)


USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Sun to Partial Shade


Pollen may cause allergic reaction

Bloom Color:


Bloom Time:

Mid Summer



Provides winter interest

Other details:

May be a noxious weed or invasive

Soil pH requirements:

4.6 to 5.0 (highly acidic)

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; direct sow outdoors in fall

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds


This plant has been said to grow in the following regions:

Middletown, New York

Gardeners' Notes:

No details have been posted.