Environmental Weeds

Environmental weeds are plants that have been introduced to areas of native vegetation, resulting in modification and damage to the natural assemblage of plants and animals within an area. Environmental weeds include some plants from different parts of Australia. Weeds are a serious threat to native plants and animals for a number of reasons:

  • Weeds compete with our native plants for water, light and nutrients leading to a reduction in biological diversity and abundance;
  • Weeds change the structural diversity of plant communities resulting in less favourable habitats for native wildlife; and
  • Weeds often increase fuel loads leading to increased fire risk to natural areas.

Some of the City's most problematic weed species include Carnation weed (Euphorbia terracina), Typha (Typha orientalis), Caltrop (Tribulus terrestris), Annual and Perennial Veldt Grass (Ehrharta longiflora and Ehrharta calycina), Wild Gladiolus (Gladiolus caryophyllaceus) and Japanese Pepper (Schinus terebinthifolius). The City's Natural Areas Team works with contractors and community groups to control these weeds using a combination of different techniques including herbicide application, hand weeding, brush cutting, excavation and revegetation.

The City undertakes the majority of its priority weed control during winter and spring. When herbicides are being applied, yellow warning signs are displayed to notify the public of treatment areas. Both selective and non-selective herbicides are used depending on the type of natural area, target weed and level of infestation. The City's contractors and Natural Areas Team are trained in herbicide application to ensure target areas are treated effectively according to the Health (Pesticides) Regulations 2011 and Guidelines for the safe use of pesticides in non-agricultural workplaces.

You can help to prevent the spread of weeds by using native species in your garden, controlling weeds on your own property, disposing of lawn clippings and garden refuse in your green bin and walking on designated footpaths in bushland areas.


For more information see:

Are_Your_Garden_Plants_Going_Bush? brochure

Weeds in the Wild brochure


CAN014 mediumHand weeding Caltrop: (Tribulus terrestris)CAN015 mediumPiles of Typha orientalis removed from a wetland ready for disposal