[7] In the southern region of Western Australia, it has become naturalised and has been classed as a weed due to its out-competing indigenous species.

The evergreen and glabrous phyllodes are mostly straight but occasionally slightly curved with a length of 4 to 20 cm (1.6 to 7.9 in) and a width of 4 to 30 mm (0.16 to 1.18 in) and have numerous prominent longitudinal veins.

It blooms between June and October in its native range, producing simple inflorescences that occur singly or in pairs in the phyllode axils on stalks with a length of less than 2 mm (0.079 in).

Control methods include hand pulling seedlings and ringbarking or using glyphosate on older plants.

Sydney golden wattle is well suited for low maintenance areas such as road batters, will grow in a range of soil types and is frost hardy.

In Portugal the species is considered highly invasive in sand dunes; its cultivation is prohibited by law.

[18] In South Africa at least, the Pteromalid wasp Trichilogaster acaciaelongifoliae has been introduced from Australia, and has spread rapidly, achieving substantial control.