Blue paperbark (karnbor) is a medium to large evergreen tree from tropical northern Australia, New Guinea and Indonesia, grown for its papery bark, blue-green leaves and cream flowers. It needs warm, humid conditions and reliably moist soil, so it suits wet sites.
Family
Myrtaceae (Myrtle family)
Grows as
Tree
Light
Full sun, Part shade
Water
Keep the soil consistently moist, especially when young; it grows naturally on wet ground and stream banks.
Soil
Tolerates sand to clay; wet or seasonally swampy soil is ideal.
Temperature
Warm to hot, frost-free conditions; protect from frost.
How easy
Moderate
Native range
New Guinea to N. Australia
Climate
seasonally dry tropical
About
Melaleuca dealbata, commonly known as karnbor or blue paperbark, is a plant in the myrtle family, Myrtaceae and is native to tropical areas in northern Australia, New Guinea and Indonesia. It is a medium to large leafy tree, growing in wet areas such as on the edges of coastal lagoons. It has papery bark, relatively large, blue-green leaves and spikes of cream-coloured flowers over a long period.
Where it grows
Karnbor occurs in southern Papua New Guinea, Irian Jaya, Indonesia and northern Australia from north of Maryborough in Queensland through north Queensland to the Top End of the Northern Territory and into the Broome-Derby area and Weaber Range in the east Kimberley region of Western Australia. It grows in warm to hot, humid, frost-free zones where the mean annual rainfall is mainly 1,100–1,750 mm (43–69 in) in summer. It is found in swampy areas near the coast and inland, mostly on wet sites along stream banks, on seasonally swampy ground and on the edges of lagoons with a range of soil types from sand to clay.
Uses
The timber from Melaleuca dealbata is moderately heavy and very strong suggesting its potential use for posts and poles. The tree is very decorative and useful for shelterbelts and soil stabilisation and has been used for the restoration of bauxite mining sites in northern Australia. It is an excellent source of nectar for honey production. The species has been tested for its oil components and found to produce an essential oil in low yield, including predominantly monoterpenes and sesquiterpenes with variation between individual plants.
[Contains information from Leaf Area Index (LAI) and Heritage Trees from data.gov.sg (National Parks Board), made available under the terms of the Singapore Open Data Licence version 1.0]
Text excerpted from the Wikipedia article Melaleuca dealbata 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.