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Acacia mearnsii

Black wattle

Garden

Wishlist

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Features

  • BloomsJanuary to May
  • Height6m to 8m
  • Spread4m to 6m
  • Speed of GrowthVery fast
  • Growth HabitBranched clump
  • Flower ColourCream-yellow
  • Leaf ColourDark green

Description

Acacia mearnsii (Black wattle). This is a fast growing 'pioneer' tree which is one of the most invasive species in the world. It has feather-like, deep green leaves and clusters of fluffy cream-yellow, spherical flowers.

Characteristics

Woody perennial, Evergreen, Small tree

Origin

Australia. This species is named after the American naturalist Edgar Alexander Mearns, who collected it from a cultivated specimen in East Africa.

Interest and use

Grown as an ornamental, for firewood, and for tannin. It has an important place in the ecology of its native Australia, binding soils and fixing nitrogen after wildfires and acting as a food source habitat for many native birds, marsupials and invertebrates.

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Needs

  • LightAny
  • HardinessHalf hardy (min 0°C)
  • SoilWell drained, Low salinity
  • Soil pH4.5 to 8.0
  • WaterSemi-moist

Cultivation

This crop has an minimum optimum growing temperature of 18C and a maximum optimum growing temperature of 30C.

Propagation

Propagate by seed in the spring. Soak them in warm water until swollen first. Root semi-ripe cuttings in summer.

Pests, diseases or disorders

Red spider mite, scale insects and mealy bug.

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