shrub

Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle

Acacia myrtifolia

The Story

Plant Bio

Acacia myrtifolia, commonly known as the myrtle wattle, is a compact, rounded Australian shrub native to heathlands and dry eucalypt forests across all six states. The species is characterised by its distinctive angled branchlets and thick, dark green phyllodes featuring an off-centre midvein.

This species is distinguished by its striking, vivid reddish-purple new growth and young stems that contrast sharply with the mature foliage. In winter and spring, it produces clusters of cream to pale yellow globular flower heads on short axillary racemes.

Uses & Benefits:

Vivid reddish-purple young stems and new growth contrast with dark green foliage, followed by cream-coloured winter flowers.

Serves as an effective low-maintenance windbreak or structural understory shrub in coastal and sandy gardens.

Provides vital winter and spring pollen for native bees, diverse insects, and small insectivorous birds.

Essentials

At a Glance

Plant Type

Shrub

Height

98 inches

Width

78 inches

Light

Full Sun, Partial Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Low to Moderate

Lifespan

Short to Moderate

Native To

Australia

Toxicity

Non-toxic

Bloom period

Winter – Spring

In flower about 4 months of the year

Planting

How to Grow

Plant in a position that receives full sun to light dappled shade to encourage dense growth and profuse flowering.
Ensure the soil is highly permeable, such as sandy loam or a sandstone-derived substrate, to prevent root rot.
Water deeply during extended dry periods, as this species naturally inhabits moisture-retentive heathlands and cannot tolerate complete dehydration.
Apply a light dressing of low-phosphorus native slow-release fertiliser in spring if planting in exceptionally poor soils.

Pro Tip

Prune lightly immediately after flowering to maintain a dense habit, taking care never to cut back into old, leafless brown wood which lacks dormant buds to reshoot.

Keep It Thriving

Care Guide

Do

Tip-prune immediately after flowering to maintain a compact, rounded form.
Provide occasional deep watering during prolonged dry spells to prevent dieback.
Ensure excellent soil drainage to protect the root system from fungal pathogens.

Don't

Do not prune hard into old, leafless brown wood, as the plant will fail to reshoot.
Do not plant in heavy, waterlogged clay soils where water pools.
Do not over-fertilise, particularly with high-phosphorus formulations.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Understory plantingLow informal hedgeCoastal gardensNative shrubberies

Companion Plants

Eucalyptus species Leptospermum Banksia Correa

Multiply

Propagation Methods

Good to Know

Common Questions

Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle questions

What zones can Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle grow in?

Myrtle Wattle, Red-stemmed Wattle, Red-stem 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 Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle bloom?

Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle typically blooms in winter through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle need full sun?

Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Myrtle Wattle, Red-stemmed Wattle, Red-stem Wattle drought tolerant?

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