Eucalyptus robusta – Swamp Mahogany - Evergreen Trees Direct

Eucalyptus robusta – Swamp Mahogany

Name: Eucalyptus robusta – Swamp Mahogany
Brand: Evergreen Trees Direct
Price: 620.00 AUD
Availability: InStock

$620.00

Tax included. Shipping calculated at checkout.

998 in stock

Size: 100L

100L 40cm/45L

Current Stock Height Guides

40cm/45L: 1.4m – 2.1m Approx.
100L: 1.7m – 3m Approx.

Trade Customers

We supply advanced trees to landscapers, developers, architects, and councils Australia-wide. Trade clients receive fast quotes, expert advice, and access to premium stock with reliable freight.

About Eucalyptus robusta – Swamp Mahogany

Eucalyptus robusta, known as Swamp Mahogany, is a fast-growing and hardy Australian native tree perfectly suited for wetter or coastal environments. Reaching heights of 15–25 meters with a broad 8–12 meter canopy, it offers dense, glossy evergreen foliage and creamy-white flowers from winter to spring that attract pollinators and support local wildlife.

Its remarkable tolerance to waterlogged, clay, and acidic soils makes it a dependable choice for challenging sites such as wetlands and coastal buffers. Thriving in full sun and withstanding light frost and coastal exposure, Swamp Mahogany requires low maintenance and moderate to high moisture, especially during establishment.

This tree looks excellent in landscapes where resilience meets natural beauty — ideal for shelterbelts, windbreaks, feature planting, and habitat restoration. If you want a reliable, fast-growing tree that enhances biodiversity while providing year-round shade and structure, Eucalyptus robusta is a standout performer.

Key Information to Know

Evergreen / Deciduous

Eucalyptus robusta – Swamp Mahogany is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 15m - 30m Approximately

Mature Width: 8 – 12 meters

Eucalyptus robusta – Swamp Mahogany is expected to grow Approx. 1 – 1.5 m per year.

Frost Tolerance

Is Eucalyptus robusta – Swamp Mahogany frost tolerant?

Eucalyptus robusta – Swamp Mahogany is Frost Tolerant – Can handle light to moderate frost once established.

Flowering Information

Eucalyptus robusta produces clusters of creamy-white fluffy flowers from winter into early spring. These nectar-rich blooms appear along the branchlets and provide a soft but valuable seasonal display that contrasts well with its dark green foliage and thick, fibrous bark.

Native Information

Is Eucalyptus robusta – Swamp Mahogany an Australian Native? Yes

Eucalyptus robusta – Swamp Mahogany is Native to Eastern Australia, from southern Sydney through coastal New South Wales into Queensland, where it grows naturally in swamps, floodplains, and wet coastal forests.

Wildlife Value

Its winter–spring flowering period supplies abundant nectar for honeyeaters, lorikeets, native bees and early-season pollinators. The dense evergreen canopy provides excellent shelter and nesting habitat for small birds, while the rugged bark supports insects and microfauna that enhance biodiversity in wetland and coastal gardens.

Sunlight Information

Eucalyptus robusta – Swamp Mahogany will thrive best in:

Full Sun

Preffered Soil

Eucalyptus robusta performs best in moist, well-drained loam or sandy loam soils and prefers slightly acidic to neutral conditions. Naturally adapted to wetter sites, it may struggle in very dry or compacted clay soils unless improved with organic matter to enhance both drainage and moisture retention. Keep soil consistently moist during establishment, then maintain deep, reliable watering as the tree matures to support healthy growth, winter flowering and long-term resilience.

Botanical Information

Common Name: Swamp Mahogany

Genus: Eucalyptus

Botanical Species: robusta

Family: Myrtaceae

Botanical Name: Eucalyptus robusta

Landscape Uses

Avenue Planting
Council or Civic Landscapes
Rural Property Planting
Revegetation or Regeneration
Shade Tree

Eucalyptus robusta – Swamp Mahogany works in an:

Australian Native Garden – celebrates local plants with natural character.
Woodland Garden – layered, naturalistic design under dappled light.
Wildlife Garden – planting to attract birds, bees, and pollinators.

Planting, Spacing & Care

Choose a sunny, open position with moist, well-drained soil.
Dig a hole twice the width of the root ball.
Add compost to enrich soil and aid establishment.
Water deeply after planting and mulch to retain moisture.
Stake young trees to encourage strong, upright growth.

Hedging & Screening: 4 – 6 meters

Feature Tree: 6 – 8 meters

Avenue Planting: 8 – 10 meters

Water regularly during establishment; minimal watering needed once mature.
Fertilise annually in spring with a native slow-release fertiliser.
Prune lightly to remove lower branches or shape the canopy if needed.

Sandy soils: Performs well with added organic matter.
Loamy soils: Ideal for steady, vigorous growth.
Clay soils: Excellent tolerance of heavy and periodically wet clay.
Coastal soils: Highly tolerant of wind and salt exposure.
Poor soils: Adaptable; compost improves establishment.

Eucalyptus robusta – Swamp Mahogany is expected to grow Approx. 1 – 1.5 m per year.

Fast Growth Rate

Root Ball Dimensions (Width × Depth) For Planting

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

30cm Pot: 33cm (W) × 30cm (D)
40cm/45L Pot: 44cm (W) × 41.5cm (D)
50cm Pot / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (D)
150L Bag: 66cm (W) × 55cm (D)
200L Bag: 71.5cm (W) × 60.5cm (D)
300L Bag: 88cm (W) × 63.8cm (D)
400L Bag: 99cm (W) × 66cm (D)
500L Bag: 122cm (W) × 66cm (D)
750L Bag: 134cm (W) × 69cm (D)
1000L Bag: 146.3cm (W) × 71.5cm (D)
2000L Bag: 176cm (W) × 82.5cm (D)

Ideal Conditions

Tropical QLD (Cairns, Townsville)
Subtropical QLD (Brisbane, Gold Coast, Sunshine Coast)
Northern NSW (Byron, Coffs, Armidale)
Sydney & Central Coast
South Coast NSW (Illawarra to Bega)
Inland NSW / Tablelands (Orange, Bathurst, Canberra)
Melbourne & Surrounds (Metro, Bayside, Geelong, Bellarine, Mornington)
Gippsland (Latrobe Valley, East Gippsland)
Adelaide Metro & Coastal

Thrives in

Full Sun

Frost Tolerance

Frost Tolerant – Can handle light to moderate frost once established.

Drought Tolerance

As a young tree it requires regular watering, and once established Eucalyptus robusta develops moderate drought tolerance. Naturally adapted to moist, swampy and coastal environments, it performs best with deep, occasional watering during dry periods to maintain strong canopy health and steady growth.

Flowering Information

Does Eucalyptus robusta – Swamp Mahogany flower?

Yes - Flowers

Flowering Period:

Winter
Spring

Flower Type:

Pollinator-attracting
Clustered

Flower Colour:

Cream

Frequently Asked Questions

Q: Can Eucalyptus robusta tolerate wet or waterlogged soil?
A: Yes, it thrives in moist to wet conditions, making it ideal for coastal and poorly drained sites.

Q: Is Eucalyptus robusta suitable for coastal or windy locations?
A: Yes, it tolerates coastal exposure and strong winds well.

Q: How fast does Eucalyptus robusta grow?
A: It has a fast growth rate, often exceeding 1m per year in optimal conditions.

Q: Does Eucalyptus robusta attract wildlife?
A: Yes, its flowers are highly attractive to birds, bees, and other pollinators.

Q: Can Eucalyptus robusta be used in shelterbelts or windbreaks?
A: Absolutely – it is well-suited for shelterbelts, windbreaks, and wetland buffers.

youtube