Weed invasion Home / Council / Environment / Conservation and natural areas / Environmental issues / Weed invasion Page ContentWeeds are plants which are not native to the area and threaten the natural vegetation. Find out how you can assist the City of Stirling by controlling weeds on your private properties. This page also contains information about drainage sump spraying. Weeds are plants which are not native to Australia or Western Australia, and their presence in our bushlands, wetlands and coastal dunes threatens the natural vegetation. Weeds have the ability to out-compete native vegetation for sunlight, water and nutrients. This struggle for resources often results in the decline of native vegetation. Once established, they can impede the growth of natural seedlings and inhibiting the regeneration of the native environment. This results in a natural environment which is remarkably different from what was previously there.The City of Stirling has an annual weed control program to combat the spread of weeds, which involves a combination of hand pulling and chemical treatment, with the help of our conservation volunteers. Targeted weeds include: FreesiasCarnation weedBlack flagBridal creeperLupinsPelargoniumand many, many more.With persisted effort, we will continue to reduce the abundance of weeds and help prevent the development of new weed populations in the future.You can assist the City by controlling weeds on your private properties and road verges. Seeds from private properties can often find their way into natural areas. Please download the Bushland weeds brochure (PDF) for information on: How do garden weeds and plants spread to natural areas?What effect do weeds have on local natural areas?Weed control—difficulties and effective methodsHow you can helpSafety tipsCommon weeds in the City of Stirling and the Perth area.Contact usFor further information please contact City's Environmental Officer Natural Areas via email or on (08) 9205 8555.