Sydney golden wattle
Fabaceae - Acacia longifolia

What does it look like?

Sydney golden wattle is a shrub or small tree that grows up to about 10m tall. Its leaves are narrow (approximately 2cm wide and 13cm long) with two prominent veins. It produces spikes of pale- or golden-yellow flowers during July - August and a seed pod up to 120mm long.

Sydney golden wattle favours open and/or disturbed habitats including coastal dunes, riparian areas, dry banks, transport corridors, scrub and open forest (e.g. coastal pōhutukawa forest), and “wastelands”.  It tolerates frost, drought, and salt spray.

Why is it a problem?

Sydney golden wattle has high growth rates and uses a lot of water, so it can shade-out other species and reduce water availability. Its deep leaf litter layer suppresses the establishment of seedlings and its ability to fix nitrogen from the atmosphere into the soil gives it a competitive advantage in a wide range of soil types. 

Sydney golden wattle produces large quantities of seeds that can remain viable in the soil for up to 50 years.  Fire and other disturbance can stimulate seed germination. It also has an extensive history of invasiveness overseas.

 

Control Methods

Physical control

  • Pull or dig small plants (all year round): ensure minimum soil disturbance. Mulch.

Herbicide control

  • Drill and fill. Drill 12mm holes, 200mm around the trunk and fill with undliuted glyphosate.
  • Cut and squirt (all year round): make 1 cut every 100mm around the trunk and saturate each cut with 5ml triclopyr 600g/L.
  • Cut trunk and paint stump (all year round): cut trunk near to the ground, and swab freshly cut stump with 100ml triclopyr (600g/L) per 1L water; or 5g metsulfuron-methyl (600g/kg) per 1L water.
  • Overall spray (spring-summer): 30ml triclopyr (600g/L) + penetrant per 10L water.

CAUTION: When using any herbicide or pesticide, PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed. 

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