Weed library - Nutgrass / Nutsedge (Cyperus rotundas)


Nutgrass also known as nutsedge, is a perennial sedge.

It grows usually up to 20-50cm tall producing glossy dark to bright green leaves. The underside of the leaf has a prominent vein running up the leaf.

The unbranched stems are erect, smooth and triangular in cross section.

The plant flowers by producing brown to reddish brown/purplish brown narrow flattened spikelet's.

Source:

Coleman, M., Kristiansen, P., Sindel, B., Fyfe, C. 2018. Nutgrass (Cyperus rotundus): Weed management guide for Australian vegetable production. School of Environmental and Rural Science, University of New England, Armidale.

Brisbane City Council 2022, Weed Identification tool, Brisbane City Council, accessed 26 January 2023, <https://weeds.brisbane.qld.gov.au/weeds/nutgrass >.

Herbicide Control Options

Step 1. Select your situation

Control Tips

Evict Bio 360 & Evict Bio 510 are both registered to control Nutgrass (Cyperus rotundus).

When using Evict Bio 360 or Evict Bio 510:


  • Apply the first application to activly growing plants when at least 20% have reached head stage (normally about February). Applying at this stage allows the herbicide to be taken up by the actively growing shoots and translocated into the tubers for best results.
  • Spray actively growing plants that are not stressed
  • Follow up treatments may be required. Refer to the product label for more information.
  • Tank mix Evict Bio 360 or Evict Bio 510 with Weed Forces Holdfast to improve results. Holdfast improves wetting and herbicide penetration of the plant foliage, resulting in superior weed control

  • DO NOT spray when the plant is stressed (i.e. Drought, physical damage, insect damage etc)

Back to Grass weeds, rushes and tussocks