tree

Brittle Gum

The Story

Plant Bio

Eucalyptus mannifera is an evergreen tree native to southeastern Australia, characterized by its open, spreading canopy and smooth, powdery bark that transitions from white to pinkish-gray. The adult foliage consists of narrow, dull blue-green leaves that release aromatic essential oils when crushed.

This species is highly distinguished by its powdery white trunk, which intensifies in color when wet and sheds in patches to reveal red-spotted new bark. In late summer, it produces clusters of small white flowers that develop into woody, cup-shaped gumnuts.

Uses & Benefits:

Features a striking powdery white trunk that intensifies in color when wet, paired with a graceful, open-spreading canopy.

Highly drought-tolerant once established and capable of growing in poor, rocky, or compacted clay soils.

Provides nesting sites and shelter for birds, while the summer flowers offer nectar for bees and other beneficial insects.

Essentials

At a Glance

Plant Type

Tree

Height

984"

Width

511"

Light

Full Sun

Zones

8, 9, 10

Water

Low

Humidity

Moderate

Lifespan

Long

Native To

Australia

Toxicity

Toxic if Ingested

Bloom period

Summer – Fall

In flower about 6 months of the year

Planting

How to Grow

Select a planting site in full sun with deep, well-draining soil, ensuring it is positioned away from structures and high-traffic areas.
Dig a hole twice as wide as the root ball but equal in depth, keeping the soil loose to encourage rapid lateral root development.
Gently remove the tree from its container, taking care not to disturb the sensitive root system, and place it in the hole at its original soil level.
Backfill with native soil without adding fertilizers, water deeply to settle the ground, and apply a thick layer of organic mulch around the base.

Pro Tip

Plant this tree well away from structures, patios, and walkways, as the wood is inherently brittle and naturally sheds small branches under wind or drought stress.

Keep It Thriving

Care Guide

Do

Water deeply and regularly during the first growing season to establish a deep, drought-tolerant root system.
Plant in a highly visible spot where the striking white and pink trunk can be viewed against a dark background.
Ensure the soil drains rapidly to prevent root rot pathogens from taking hold.

Don't

Do not apply high-phosphorus or heavy synthetic fertilizers, as established trees require no supplemental feeding.
Do not prune heavily into old, leafless wood, which lacks active buds and will fail to recover cleanly.
Do not plant directly over parking spaces, patios, or roofs due to the tree's natural habit of dropping minor limbs.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen TreeWindbreakShade TreeXeriscaping

Companion Plants

Westringia fruticosa Grevillea Salvia Lomandra longifolia

Multiply

Propagation Methods

Good to Know

Common Questions

Brittle Gum questions

What zones can Brittle Gum grow in?

Brittle Gum 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 Brittle Gum bloom?

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

Does Brittle Gum need full sun?

Brittle Gum does best in full sun (6+ hours).

Is Brittle Gum drought tolerant?

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