Mimosa bush (Vachellia farnesiana)

Mimosa bush is a shrub to small tree. It occurs in the north-east and parts of north-west of NSW.


How does this weed affect you?

It has invaded grasslands in the north-east of NSW and is a major weed in some local areas. 

What does it look like?

Mimosa bush is a sparsley-leaved shrub 1-4 m high. Leaves are sparse and feathery looking. The tiny leaflets are 4-9 mm long. Flowers heads are bright yellow and pompom-like. The pods are black, woody, curved and 5-7 cm long. 

This plant is different from Mimosa pigra, which is a larger tree that grows in northern Australia. 

Where is it found?

Mimosa bush has been found growing in parts of the Western region.


Cunningham G.M., Mulham W.E., Milthorpe P.L. and Leigh J.H. ( 1992). Plants of western New South Wales. (Inkata Press, Melbourne).

More information

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Herbicide options

Users of agricultural or veterinary chemical products must always read the label and any permit, before using the product, and strictly comply with the directions on the label and the conditions of any permit. Users are not absolved from compliance with the directions on the label or the conditions of the permit by reason of any statement made or not made in this information. To view permits or product labels go to the Australian Pesticides and Veterinary Medicines Authority website www.apvma.gov.au

See Using herbicides for more information.

PERMIT 14929 Expires 30/09/2029
Clopyralid 300 g/L (Lontrel®)
Rate: 500 mL in 100 L of water
Comments: High volume foliar application. Apply to actively growing plants in full leaf. Add a surfactant.
Withholding period: 1-12 weeks (see label).
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate

PERMIT 13891 Expires 31/03/2023
Tebuthiuron 200 g/kg (Graslan®)
Rate: 2 g per square metre
Comments: Read and follow permit and label instructions thoroughly
Withholding period: Nil.
Herbicide group: C, Inhibitors of photosynthesis at photosystem II (PS II inhibitors)
Resistance risk: Moderate

Fluroxypyr 333 g/L (Starane™ Advanced)
Rate: 1 L in 55 L of diesel (or biodiesel).
Comments: Basal bark application
Withholding period: Do not graze failed crops and treated pastures or cut for stock food for 7 days after application. See label for more information.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate

Triclopyr 240 g/L + Picloram 120 g/L (Access™ )
Rate: 1.0 L per 60 L of diesel (or biodiesel such as Biosafe).
Comments: Basal bark application for plants with stems up to 5 cm diameter at the base. Cut stump application can be used for plants with stems up to and in excess of 5 cm diameter at the base. Treat all stems on multi-stem plants. See label for information about biodiesel.
Withholding period: Nil
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate

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Biosecurity duty

The content provided here is for information purposes only and is taken from the Biosecurity Act 2015 and its subordinate legislation, and the Regional Strategic Weed Management Plans (published by each Local Land Services region in NSW). It describes the state and regional priorities for weeds in New South Wales, Australia.

Area Duty
All of NSW General Biosecurity Duty
All plants are regulated with a general biosecurity duty to prevent, eliminate or minimise any biosecurity risk they may pose. Any person who deals with any plant, who knows (or ought to know) of any biosecurity risk, has a duty to ensure the risk is prevented, eliminated or minimised, so far as is reasonably practicable.

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For technical advice and assistance with identification please contact your local council weeds officer.
For further information call the NSW DPI Biosecurity Helpline on 1800 680 244 or send an email to weeds@dpi.nsw.gov.au

Reviewed 2022