Impatiens (Impatiens walleriana) is regarded as an environmental weed in Queensland and New South Wales, and as a "sleeper weed" in other parts of Australia. This species has escaped cultivation and has often become naturalised in riparian areas and native bushland near habitation. It is probably most common in south-eastern Queensland, where it is ranked among the top 200 most invasive plant species., Impatiens (Impatiens walleriana) is mainly naturalised in riparian habitats and other moist areas in south-eastern Queensland. It has also been recorded in Palmerston National Park in northern Queensland, where it has colonised forest margins and is also displacing native fern communities around waterfalls., This species is also naturalised in bushland and around habitation in the coastal districts of New South Wales. It appears on several local and regional environmental weed lists in these parts of New South Wales (e.g. in Warringah Council, Pittwater Council, Lismore Council, the Sydney North region, the NSW North Coast region and the wider Sydney and Blue Mountains region) and has been recorded in some conservation areas throughout the eastern parts of the state (e.g. in Billinudgel Nature Reserve and Tunnel Gully Reserve). Impatiens (Impatiens walleriana) is also listed among the invasive weed species that threaten the integrity of particular stands of endangered littoral rainforest in New South Wales.