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Eucalyptus robusta
Also called Swamp Messmate, Swamp Mahogany, Swamp Stringybark, Swamp Mahogany Gum
A tall, fast-growing Australian eucalyptus that naturally grows in swamps and wet coastal soils, and is grown as a timber or street tree. It is too large for most home gardens, so it suits only large, wet or waterlogged sites.
Eucalyptus robusta, commonly known as swamp mahogany or swamp messmate, is a tree native to eastern Australia. Growing in swampy or waterlogged soils, it is up to 30 m (100 ft) high with thick spongy reddish-brown bark and dark green broad leaves, which help form a dense canopy. The white to cream flowers appear in autumn and winter. The leaves are commonly eaten by insects and are a food item for the koala. It is an important autumn-winter flowering species in eastern Australia and has been planted extensively in many countries around the world. Its timber is used for firewood and in general construction.
This species occurs in swamps and alongside estuaries in a narrow coastal strip, usually within a few kilometres of the ocean, from Rockhampton, Queensland, south to Jervis Bay, New South Wales. It is also found offshore on Great Keppel, Moreton, Fraser and North and South Stradbroke Islands. It is widely planted as a timber tree, and is considered to be invasive in Hawaiʻi and Réunion, and has become naturalised in Florida. It generally grows on heavy clay soils, but is also found on sandy clay and alluvial sand soils. It grows on sand on offshore islands. Found from sea level to altitudes of 50 m (160 ft) above sea level, it grows in swamps or areas where the water table is high, generally fresh or brackish in nature. Older plants are able to tolerate salt but seedlings cannot. Eucalyptus robusta can also grow in highly acidic sulphate estuarine soils with a pH as low as 2.5. It is a dominant tree in swamp forests, often growing in pure stands or with other trees such as red mahogany (E.
Eucalyptus robusta adapts well to cultivation, though it often grows too large for home gardens. It has been used as a street tree, and is useful in public areas with wet soils. It can grow very quickly in cultivation and flower profusely. It can flower in its third year of growth in cultivation in optimal conditions, and its timing makes it an important source of food during autumn and winter. Birds are attracted to its flower heads. However, in some years its leaves are infested with lerps and detract from its appearance. A row of E. robusta was planted at the Royal Botanic Gardens, Sydney in 1813, and the trees are still healthy.
White eucalyptus · New England Stringybark · River redgum · Coowarra Box · Coolabah · Narrowleaf red ironbark · White gum · Indonesian gum · River peppermint gum · Tasmanian bluegum · Cider gum · Araluen Gum
Text excerpted from the Wikipedia article Eucalyptus robusta by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
