Acacia chalkeri

Chalker's wattle

Family: Fabaceae subfamily Mimosoideae

Grows to 4 m high and about 2 m wide, with a bushy habit. It is a species confined to a small area around the Wombeyan Caves in the Southern Highlands of New South Wales (north-west of Mittagong) where it grows in shallow limestone-enriched soils.

The grey-green phyllodes (modified leaves) are ascending to erect with an oblanceolate shape and a length to 6 cm and about 1 cm wide.

Flowering occurs between October and January. Flowers are produced in globular heads, to 6 mm in diameter with up to 25 very small, staminate flowers in each head. The heads are produced in racemes of up to 9 heads, emerging from leaf axils.

Seed pods are around 9 cm long and less than 1 cm wide, containing shiny black seeds. 

In the garden

Not too much is known about its cultivation potential.

It naturally occurs on limestone soil. However, it will grow in most soils in full sun.

Acacias can suffer from a number of pests, including borers, scale, galls and leaf miners. Growing plants suitable to your local environment minimises these occurring.


Propagation is easy from scarified seed by covering with boiling water for 24 hours and discarding any seeds still floating on the surface.

Other information

Considered similar to Acacia amoena which has longer phyllodes and fewer flower heads.

Most wattles regenerate from seed after fire with some species exhibiting basal re-shooting.

Acacia – from Greek acis, meaning a thorn or “thorny”.
chalkeri – named after Thomas Michael Chalker who worked as a caretaker and the first guide at Wombeyan Caves, NSW, in the years 1888-1925.

Not considered at risk in the wild, although it has a restricted distribution.


By Jeff Howes