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Growing Acacia salicina: Willow Acacia

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Form: Tree.
Lifespan: 15-50 years.
Leaf retention: Evergreen.
Growth rate: Rapid.
Mature Size: 30-40' high and 15-20' wide.
Flowers: White to yellow-white puffballs, fragrant.
Bloom: Any time during the year, especially late winter or spring.
Fruit: A brown seed pod, usually over 3" long, containing edible seeds.
Leaves: Leaf-like stalks, linear, blue- to dark-green. Moderate shade.
Stems: Young branches, and the top portion of older branches, are pendulous. The wood is weak and without thorns.
Roots: Nitrogen-fixing*, deep. This tree often produces suckers from its roots.
Wildlife: Attracts pollinating insects and birds. The seeds attract mammals.
Toxic / Danger: The leaves are slightly poisonous. The bark has a high tannin content.
Origin: Australia.

Cultivation and Uses
USDA hardiness zones: 7-11.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water after becoming established: Deep water every one or two months at the drip line, or just beyond, to establish a strong root system. Frequent shallow watering results in rapid growth and weak wood that is prone to break in strong winds.
Soil: Well drained, dry, low in organic content, pH 6.1-9.0 (slightly acidic to highly alkaline). This plant is saline tolerant. *Do not use a nitrogen fertilizer.
Mulch: No. The soil should dry as quickly as possible.
First Year Care: This tree should be staked in its first year to establish an upright growth pattern.
Prune: Remove excess and crossing branches to reduce wind resistance. Remove small trees that sucker from the roots. This tree responds well to pruning.
Litter: Seed pods.
Propagation: Scarified seed. This plant depends on animals, including cattle, to disperse its seeds.
Uses: Ornamental.

Acacia salicina is a member of the Legume family (Fabaceae). It is very hardy and adaptable when the soil is well-drained. Its disadvantages are branch breakage in strong winds and frequent suckering.

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Latest update: February, 2019.

Acacia salicina: Willow Acacia - flower

Acacia salicina: Willow Acacia - leaves

Acacia salicina: Willow Acacia - seed pods

Acacia salicina: Willow Acacia