1 named cultivar

‘Great Balls of Fire’Bottlebrush 'Great Balls of Fire'

tree

Willow Bottlebrush

The Story

Plant Bio

Callistemon salignus, the willow bottlebrush, is an evergreen Australian tree or large shrub native to wet riparian zones of New South Wales and Queensland. The species is highly adaptable, thriving in heavy clay and waterlogged soils where most other garden plants fail.

This species is distinguished by its weeping branchlets of soft, narrow-elliptic foliage and papery, white-to-grey bark that flakes off in layers. The spring flowers consist of dense, cream-to-yellow stamen spikes resembling bottle brushes, followed by decorative flushes of pinkish-red new leaf growth.

Uses & Benefits:

Features weeping foliage, papery white bark, cream bottlebrush flowers, and bright pinkish-red new growth.

Thrives in waterlogged, heavy clay soils, making it highly effective for erosion control along banks.

Provides abundant nectar for honeyeaters, lorikeets, native bees, and other insect pollinators.

Essentials

At a Glance

Plant Type

Tree

Height

394 inches

Width

157 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Medium to high

Humidity

Moderate to high

Lifespan

Long-lived

Native To

Eastern Australia

Toxicity

Non-toxic

Planting

How to Grow

Select a planting site in full sun to partial shade with moist, clay, or poorly drained soil.
Dig a hole twice the width of the root ball and of equal depth, ensuring the soil is thoroughly damp.
Position the plant at its original container depth, backfill with native soil, and firm down gently.
Water deeply at the base and apply a thick layer of organic mulch, keeping it clear of the trunk.

Pro Tip

Prune the branch tips immediately after the spring flowering flush; cutting back into old, leafless wood prevents latent buds from shooting and leaves permanent bare patches.

Keep It Thriving

Care Guide

Do

Prune lightly and regularly after flowering to maintain a dense, bushy form.
Water regularly during dry periods to encourage optimal growth and flowering.
Apply a low-phosphorus native-formulated fertiliser once a year in spring.

Don't

Do not prune hard into old, leafless brown wood as it fails to regenerate.
Do not plant in dry, sandy soils without providing supplementary irrigation.
Do not use standard high-phosphorus fertilisers which can damage native root systems.

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

Riparian restorationScreening and windbreaksWet area plantingSpecimen treeHedges

Companion Plants

Melaleuca alternifolia Leptospermum petersonii Carex appressa Lomandra longifolia

Multiply

Propagation Methods

Good to Know

Common Questions

Willow Bottlebrush questions

What zones can Willow Bottlebrush grow in?

Willow Bottlebrush 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 Willow Bottlebrush bloom?

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

Does Willow Bottlebrush need full sun?

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

Is Willow Bottlebrush drought tolerant?

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