tree

Green Wattle

Acacia decurrens

The Story

Plant Bio

Acacia decurrens is a fast-growing, medium-sized evergreen tree native to southeastern Australia. It develops an erect profile with a green trunk and distinctive winged ridges running along the branchlets.

The dark green to grayish-green foliage is bipinnate, divided into exceptionally fine leaflets that give the canopy a soft, feathery texture. In spring, the tree produces a heavy display of bright golden-yellow globular flower heads arranged in large clusters.

Uses & Benefits:

Bright golden-yellow spring blooms contrast sharply with the fine, dark green bipinnate foliage.

Fast growth habit makes it highly effective for rapid screening and soil erosion control on slopes.

Provides pollen and nectar for bees and other beneficial insects in early spring.

Essentials

At a Glance

Plant Type

Tree

Height

590"

Width

394"

Light

Full Sun

Zones

9, 10

Water

Low to Moderate

Humidity

Moderate

Lifespan

10-15 years

Native To

Southeastern Australia

Toxicity

Mildly toxic to livestock if ingested in large quantities

Bloom period

Spring

In flower about 3 months of the year

Planting

How to Grow

Select a planting site in full sun with highly drained sandy, loamy, or clay loam soil.
Dig a hole twice as wide as the root ball but no deeper, ensuring the crown sits level with the surrounding soil.
Water deeply to settle the soil, then apply a light layer of mulch, keeping it clear of the trunk.
Irrigate regularly during the first growing season to establish the root system, then reduce watering to a minimum.

Pro Tip

Avoid heavy pruning and high-nitrogen fertilizers; rapid growth creates brittle wood and shortens the tree's natural fifteen-year lifespan.

Keep It Thriving

Care Guide

Do

Prune lightly immediately after flowering to maintain shape.
Grow in a position with excellent air circulation to prevent fungal issues.
Use low-phosphorus fertilizers if supplemental feeding is necessary.

Don't

Do not prune heavily into old, leafless wood, as it will not regenerate.
Do not plant in poorly drained or waterlogged soils.
Do not over-fertilize, which causes weak, structurally brittle branches.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen TreeWindbreakErosion ControlScreening

Companion Plants

Ceanothus thyrsiflorus Cercis occidentalis Eschscholzia californica

Multiply

Propagation Methods

Good to Know

Common Questions

Green Wattle questions

What zones can Green Wattle grow in?

Green Wattle is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Green Wattle deer resistant?

Not reliably. Deer may browse Green Wattle, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Green Wattle bloom?

Green Wattle typically blooms in spring through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Green Wattle need full sun?

Green Wattle does best in full sun (6+ hours).

Is Green Wattle drought tolerant?

Yes — once established (usually after the first full season), Green Wattle handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.