Agonis flexuosa
tree

Australian Peppermint

Agonis flexuosa

The Story

Plant Bio

Agonis flexuosa, known as the peppermint tree, is an evergreen Myrtaceae species native to coastal Western Australia that develops a weeping, architectural form with twisting branches and fibrous bark. The narrow, lanceolate leaves emit a strong, pungent peppermint aroma when crushed, distinguishing it from lookalike eucalyptus species.

Small, five-petalled white flowers cluster densely in the leaf axils along the pendulous branchlets during spring and summer. Cultivars vary significantly in stature and foliage colour, ranging from dwarf shrubs to deep burgundy or golden-leaved selections.

Uses & Benefits:

Ornamental UsesValued for its graceful weeping habit, aromatic foliage, and dense clusters of white flowers.
Practical UsesHighly effective as a windbreak or shade tree in coastal and sandy soils.
Ecological BenefitsProvides habitat and forage for native bees, beneficial insects, and insectivorous birds.

Essentials

At a Glance

Plant Type

Tree

Height

393 inches

Width

236 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Low

Humidity

Moderate

Lifespan

Long-lived

Native To

Western Australia

Toxicity

Non-toxic

Planting

How to Grow

  1. Select a planting site in full sun to partial shade with excellent, free-draining sandy or loamy soil.
  2. Dig a hole twice the width of the root ball and plant at the same depth as the nursery container.
  3. Water deeply during the first summer to establish a deep root system, then reduce frequency.
  4. Apply an annual slow-release, low-phosphorus native fertiliser in early spring.

Pro Tip

Prune only into active, leafy growth immediately after flowering; cutting back into old, bare interior wood destroys the weeping habit and fails to trigger epicormic shooting.

Keep It Thriving

Care Guide

Do

  • Ensure excellent soil drainage to prevent root rot.
  • Prune lightly after flowering to maintain shape and density.
  • Use low-phosphorus native fertilisers if feeding is required.

Don't

  • Do not plant in heavy, waterlogged clay soils.
  • Do not prune hard back into old, bare wood as it will not reshoot.
  • Do not over-fertilise or over-water once established.

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Fertilize
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen treeCoastal windbreakShade treeScreening plant

Companion Plants

Banksia attenuataAnigozanthos flavidusWestringia fruticosa

Multiply

Propagation Methods

Good to Know

Common Questions

Australian Peppermint questions

What zones can Australian Peppermint grow in?

Australian Peppermint 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.

When does Australian Peppermint bloom?

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

Does Australian Peppermint need full sun?

Australian Peppermint does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Australian Peppermint drought tolerant?

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

More Agonis to compare

After Dark Peppermint Tree

After Dark Peppermint Tree

Agonis flexuosa 'After Dark'

Zones 9–10· 2 saves

Keep exploring

Explore the genus

Hardy in your zone?

Grow Australian Peppermint with confidence

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