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Illawarra Flame Tree

The Story

Plant Bio

Brachychiton acerifolius, the Illawarra flame tree, is a deciduous or semi-deciduous Australian tree that reaches heights of ten to thirty metres in its native coastal rainforests. The tree drops its glossy, maple-like juvenile or entire adult leaves in late spring, immediately preceding a dense display of bright red, bell-shaped flowers along the bare branches.

This species is distinguished by its brilliant crimson panicles and its highly variable foliage, which transitions from deeply lobed juvenile leaves to simpler, ovate adult forms. Mature specimens develop a dense, rounded canopy and a characteristically swollen lower trunk that stores moisture during dry periods.

Uses & Benefits:

Provides a dramatic seasonal display of bright red flowers on bare branches, followed by attractive glossy green foliage.

Functions as an effective medium-to-large shade tree for parks, acreage, and large gardens once established.

Attracts and supports native nectar-eating birds, such as honeyeaters and parrots, as well as native pollinating insects.

Essentials

At a Glance

Plant Type

Tree

Height

1181 inches

Width

590 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Low to Moderate

Humidity

High

Lifespan

Long-lived

Native To

Eastern Australia

Toxicity

Irritant (seed pod hairs)

Bloom period

Late spring – Summer

In flower about 3 months of the year

Planting

How to Grow

Select a planting site in full sun with deep, well-drained loamy or sandy soil.
Dig a hole twice as wide as the root ball but to the same depth, ensuring the trunk flare remains level with the surrounding soil.
Water the young tree deeply after planting and apply a layer of organic mulch, keeping it clear of the trunk.
Protect young specimens from heavy frost during their first few winters using a temporary frame or cover.

Pro Tip

Avoid pruning heavy branches back into old, leafless wood, as dormant buds on mature timber fail to shoot reliably and will ruin the tree's structural integrity.

Keep It Thriving

Care Guide

Do

Water regularly during the establishment phase to encourage deep root development.
Wear gloves and safety glasses when handling mature, woody seed pods to avoid irritating stellate hairs.
Formatively prune young trees to maintain a single, strong central leader.

Don't

Do not plant in poorly drained, waterlogged, or permanently wet soils.
Do not prune back into old, leafless wood as epicormic recovery is poor.
Do not expect consistent, heavy flowering every year, as seasonal temperature and rainfall cues cause irregular flowering cycles.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen treeShade treeStreet treeFeature planting

Companion Plants

Doryanthes excelsa Lomandra longifolia Ficus coronata

Multiply

Propagation Methods

Good to Know

Common Questions

Illawarra Flame Tree questions

What zones can Illawarra Flame Tree grow in?

Illawarra Flame Tree 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 Illawarra Flame Tree bloom?

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

Does Illawarra Flame Tree need full sun?

Illawarra Flame Tree does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Illawarra Flame Tree drought tolerant?

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