tree

River Red Gum

The Story

Plant Bio

Eucalyptus camaldulensis is a massive evergreen tree native to Australian river corridors, characterized by a thick trunk, heavy twisting branches, and a broad, open crown. The smooth bark peels in patches of white, cream, and grey, often leaving rough, dark slabs at the base of mature specimens.

This species is distinguished by its extreme adaptability to seasonal flooding and prolonged drought, utilizing a deep taproot system to access groundwater. The adult foliage consists of narrow, curved, grey-green leaves that hang vertically to minimize solar radiation.

Uses & Benefits:

Features striking mottled bark in shades of white, cream, and grey, paired with a massive, sculptural canopy of weeping grey-green foliage.

Serves as an effective windbreak and provides rapid erosion control along riverbanks and flood-prone slopes.

Provides nesting hollows and canopy cover for local birds, while the summer flowers support bees and other beneficial insects.

Essentials

At a Glance

Plant Type

Tree

Height

1771"

Width

984"

Light

Full Sun

Zones

8, 9, 10

Water

Moderate

Humidity

Moderate

Lifespan

Long-lived

Native To

Australia

Toxicity

Toxic if Ingested

Bloom period

Summer

In flower about 3 months of the year

Planting

How to Grow

Select a planting site in full sun with deep soil and ample clearance from buildings, power lines, and underground pipes.
Dig a hole twice as wide as the root ball but no deeper, ensuring the root flare sits level with the surrounding soil.
Backfill with native soil without adding soil amendments or high-phosphorus fertilizers.
Water deeply and regularly during the first two growing seasons to establish the deep taproot system.

Pro Tip

Never position high-use outdoor seating or parking areas beneath the canopy, as mature trees shed heavy limbs without warning during hot, dry weather.

Keep It Thriving

Care Guide

Do

Provide deep, infrequent watering during extended dry spells to mimic natural riverine flooding.
Inspect the canopy annually for deadwood or structurally weak branches that require professional removal.
Protect young trees from deer and rabbits using physical wire guards around the trunk.

Don't

Do not plant this tree within 50 feet of septic lines, pavement, or building foundations.
Do not perform heavy pollarding or cut back into old, leafless wood, which ruins the natural architectural form.
Do not apply high-nitrogen or high-phosphorus fertilizers, which can cause weak, rapid growth.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen TreeWindbreakShade TreeErosion Control

Companion Plants

Populus fremontii Platanus occidentalis Baccharis salicifolia

Multiply

Propagation Methods

Good to Know

Common Questions

River Red Gum questions

What zones can River Red Gum grow in?

River Red 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.

Is River Red Gum deer resistant?

Not reliably. Deer may browse River Red Gum, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does River Red Gum bloom?

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

Does River Red Gum need full sun?

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

Is River Red Gum drought tolerant?

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