A water-loving plant imported from America, American skunk-cabbage (lysichiton americanus) is now stinking-up our water bodies and watercourses.

Although it might look like attractive, parrot’s feather (myriophyllum aquaticum) is slowly swallowing our waterbodies and waterways.

Once a highly-prized plant that was hugely fashionable in the UK, Japanese knotweed (fallopia japonica) is now listed as one of the world's worst invasive species.

Although it’s an attractive plant, Himalayan balsam (impatiens glandulifera) is an ecological pink nightmare.