A weed is a plant that is not native to an area and has the potential to dominate and out compete our native species. Most of the plants that are now weeds in Western Australia (WA) were introduced deliberately, as garden ornamentals, pastures or food crops. Many of the weeds in WA come from Europe, South Africa, the Americas and eastern Australia.
Environmental weeds that compete with and displace local endemic plant species are a significant threat to natural areas. Weeds compete with local endemic plant species for space and light and deprive local fauna of suitable habitat. Controlling weeds in natural areas is a significant cost to the management of these natural areas.
Approximately 197 weed species known to occur within the City of Kalamunda.