Acacia longissima

Long-leaf wattle or Narrow-leaf wattle

Family: Fabaceae subfam. Mimosoideae

A tall shrub to tree, reaching to 6 m tall.

Grows near the coast and is found as far north as Nambour and Nerang in south-eastern Queensland, extending down the south coastal areas of New South Wales to around Batemans Bay. It is often found to inhabit the borders of rainforests in wet or dry sclerophyll forest.

The phyllodes (modified leaves) are thin and dark green and are usually straight with a length to 18 cm, and a width to 1 cm.

Flowers are produced in linear spikes consisting of many small staminate flowers. Spikes are produced singularly or in pairs, in the axils of phyllodes, to 5 cm long, pale yellow to white and occur between January and May.

Seed pods are straight or slightly curved and usually 14 cm long, to 0.4 cm wide.

In the garden

Attractive slender erect small tree suited to gardens in a full sun/shade position with some moisture and even waterlogged soils.

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

Most wattles regenerate from seed after fire with some species exhibiting suckering from the base.

Acacia – from Greek acis, meaning a thorn or “thorny”.
longissima – Latin for “longest” referring to the long narrow phyllodes of this particular species.

Not considered to be endangered in the wild.


By Jeff Howes