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in Tucson, Phoenix,
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Acacia salicina: Cooba / Willow Acacia

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Description
Form: Tree.
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 year, especially late winter or spring.
Fruit: Brown pod usually over 3" long.
Leaves: Leaf-like stalks, linear, blue- to dark-green. Moderate to dense shade.
Stems: No thorns, weak.
Roots: Nitrogen-fixing*, deep, may sucker.
Wildlife: Attracts pollinating insects and birds.
Toxic / Danger: Low. Seedpods slightly poisonous.
Origin: Australia.

Cultivation and Uses
USDA hardiness zones: 9-11.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun.
Water after becoming established: Deep water every month or two at drip line, or just beyond, to establish strong root system.
Soil: Well drained, dry, low in organic content, pH 6.1-9.0 (slightly acidic to highly alkaline). *Do not use a nitrogen fertilizer.
Mulch: No.
Prune: Remove excess and crossing branches to reduce wind resistance. Remove small trees that sucker from roots.
Litter: Low.
Propagation: Scarified seed.
Uses: Ornamental.

Comments
Fairly hardy and adaptable when soil is well-drained. Severe frosts may limit growth.



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Acacia salicina: Cooba / Willow Acacia - flower

Acacia salicina: Cooba / Willow Acacia - leaves

Acacia salicina: Cooba / Willow Acacia - seed pods

Acacia salicina: Cooba / Willow Acacia