tree

Early Black Wattle, Green Wattle, Sydney Green Wattle

Acacia decurrens

The Story

Plant Bio

Acacia decurrens, commonly known as the early black wattle, is a fast-growing, medium-sized evergreen tree native to New South Wales and Queensland. The species develops an erect habit with an open, spreading canopy and a smooth green trunk that darkens with age.

This species is distinguished by its dark green, highly dissected bipinnate foliage and branchlets featuring prominent wing-like ridges that run down from the petioles. In spring, it produces heavy clusters of golden-yellow globose flower heads arranged in axillary racemes or terminal panicles.

Uses & Benefits:

Features fine, dark green bipinnate foliage and bright golden-yellow spring blooms on an erect, open-canopied frame.

Serves as a fast-growing windbreak or shade tree, though its lifespan is relatively short.

Provides food and habitat for native insects, pollinators, and nectar-feeding Australian birds during spring.

Essentials

At a Glance

Plant Type

Tree

Height

590 inches

Width

393 inches

Light

Full Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Medium

Lifespan

Short-lived

Native To

Australia (New South Wales, Queensland)

Toxicity

Non-toxic

Bloom period

Spring

In flower about 1 month of the year

Planting

How to Grow

Select a full sun position with reasonably well-drained soil.
Dig a hole twice the width of the root ball and of equal depth.
Plant the seedling, backfill with local soil, and water in thoroughly to settle the roots.
Maintain consistent moisture during the first summer to ensure successful establishment.

Pro Tip

Avoid pruning back into old, leafless wood, as epicormic buds in mature stems recover poorly and severe cuts will shorten the tree's naturally brief lifespan.

Keep It Thriving

Care Guide

Do

Plant in a full sun position with reasonably well-drained soil.
Perform light formative pruning immediately after spring flowering.
Monitor the trunk regularly for signs of borer activity.

Don't

Do not prune heavily into old, leafless wood.
Do not plant this species near bushland boundaries outside its native New South Wales and Queensland range.
Do not over-fertilise with high-phosphorus mixtures.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

In the Garden

Landscape Uses & Companions

Landscape Uses

WindbreakShade TreeScreening

Multiply

Propagation Methods

Good to Know

Common Questions

Early Black Wattle, Green Wattle, Sydney Green Wattle questions

What zones can Early Black Wattle, Green Wattle, Sydney Green Wattle grow in?

Early Black Wattle, Green Wattle, Sydney Green Wattle is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Early Black Wattle, Green Wattle, Sydney Green Wattle bloom?

Early Black Wattle, Green Wattle, Sydney 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 Early Black Wattle, Green Wattle, Sydney Green Wattle need full sun?

Early Black Wattle, Green Wattle, Sydney Green Wattle does best in full sun (6+ hours).

Is Early Black Wattle, Green Wattle, Sydney Green Wattle drought tolerant?

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