Name: Japanese Knotweed
Scientific name: Fallopia japonica
Nature Stars: 20
About: This plant came to the UK from Japan as a garden plant but has since become a real problem because it is so hard to get rid of.
How to identify: Very tall ( up to 2 meters) with hollow stems that are a bit like bamboo and small white tufty flowers in late summer and autumn.
Where: Grows in most areas of the UK and Ireland
Fantastic fact: Also known as monkeyweed, elephant ears and donkey rhubarb
Photograph credit: Philip Precey