Variations 
var. aurea
This variation of the species produces new growth and foliage that is yellowish.

var. purpurea
This tree is simular to the species but has purplish tinged foliage and is commonly grown for colour contrast in domestic gardens. It grows in full sun on most well drained moderately fertile soils and is frost, drought and 2nd line salt tolerant. It has a low water requirement once established (Scale: 1-drop from 3), responding to mulch and an occasional deep watering during dry periods.

Weed Potential 
As a weed Cootamundra Wattle is invasive appearing predominately in low rainfall regions and appears in woodlands or forests. It forms dense stands that reduce light inhibiting the regeneration of native tree or shrub seedlings. 

It is fast growing tolerating most soils and positions maturing in 2 to 4 years and living for up to 20 years. Seeds are produced prolifically from spring to early summer and can remain dormant in the soil for up to 10-years. Disturbance under plants stimulates seed germination and Cootamundra Wattle can fix nitrogen in the soil adding fertility and encouraging seedling growth. The seeds are dispersed by birds, ant’s water or in soil and garden waste. 

Control methods include physically digging out seedlings and small plants when the soil is moist ensuring that the roots are removed. Fruiting branches should be bagged and destroyed. Plants can be cut and painted on the stems or drilled and injected in the trunk with a non-selective herbicide during spring. Young plants or seedlings may be sprayed with a non-selective herbicide during spring while the plant is actively growing but follow up spraying will be required.