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Silver Wattle

Acacia dealbata

Also listed as Racosperma dealbatum, Mimosa dealbata

Also known as Mimosa, Blue Wattle, Golden Mimosa

tree☀️ full sun💧 low water❄ Hardy: Zone 9a – Zone 11b

Climate Match for your location

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Silver wattle is a fast-growing Australian tree prized for its feathery, blue-green foliage and cheerful clusters of bright yellow flowers that bloom in late winter. It's drought-tolerant once established and makes an excellent accent or screening plant in warm climates.

Why grow it

Silver wattle establishes faster than many Australian acacias and tolerates poor, sandy, or compacted soils where other ornamentals struggle. Its winter flowering period fills a gap when many other landscape plants are dormant, and it requires minimal supplemental irrigation once roots develop. Compared to other screening species, it offers relatively fine texture and bright color without demanding high fertility or frequent pruning.

Watch out for

Young trees benefit from staking in windy sites, as rapid growth can produce brittle wood prone to storm damage. Extended wet conditions or poorly draining soil may stress the plant, even though it's generally drought-hardy once mature. Flowering and foliage quality decline noticeably in shaded locations, so site selection matters more than ongoing maintenance.

Overview

Form
Spreading
Growth Rate
fast
Size
40–50′ tall × 30–40′ wide
Dormancy
evergreen
Family
Fabaceae
EdibleDynamic accumulatorBiomass and mulchErosion controlWindbreakPollinators & beneficial insects

Native Range

Southeastern Australia

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

WinterSpring

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Companion Planting

Plants well with