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Acacia melanoxylon

Australian blackwood

A graceful evergreen tree possibly reaching 12m. Its 'leaves' are leathery grey-green and variable in shape. Some are ferny in shape with a slender stem, some have a saml leaf where the stem is flattened, but generally they are just the leaf stem alone, flattend into a 'leaf' longer than they are wide with a slight curve. In spring, the flowers are clouds of small, fluffy white to pale yellow flowers which may develop into 10cm brown, twisted-ribbon seed pods. The bark is grey with dark fissures

Other common names
blackwood
blackwood acacia
see moreTasmanian lightwood
Synonyms
Acacia arcuata
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Size
Ultimate height
8–12 metres
Time to ultimate height
10–20 years
Ultimate spread
4–8 metres
Growing conditions
Loam
Sand
Moisture
Well–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Yellow Cream White Green Grey Silver
Summer Green Grey Silver
Autumn Green Grey Silver Brown
Winter Green Grey Silver
Position
  • Full sun
Aspect

East–facing or North–facing or South–facing or West–facing

Exposure
Sheltered
Drought resistance
Yes
Hardiness
H3
Botanical details
Family
Fabaceae
Native to the UK
No
Foliage
Evergreen
Genus

Acacia can be deciduous or evergreen trees, shrubs or climbers, with alternate, pinnately divided leaves or simple modified leaf-like stalks (phyllodes), and tiny, sometimes fragrant, flowers in short spikes, or in racemes or spikes of spherical heads

Name status

Correct

Plant range
S Australia

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How to grow

Cultivation

Grow outdoors in neutral to acid well-drained soil in sheltered location with full sun. Suits courtyard and urban gardens in milder locations, but will need winter protection elsewhere. Under glass, grow in ericaceous or loam-based compost (peat-free JI No.2) in full light. Resents hard pruning. For more advice see tree cultivation

Propagation

Propagate by semi-ripe cuttings or seed. For advice see propagation from seed (tree/shrub

Suggested planting locations and garden types
  • Architectural
  • City and courtyard gardens
  • Gravel garden
  • Mediterranean climate plants
Pruning

Pruning group 8

Pests

May be susceptible to glasshouse red spider mite, fluted scale and mealybugs

Diseases

Generally disease-free

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