How to kill Japanese knotweed — get rid of it for good

wooden fence with Japanese knotweed growing behind
(Image credit: Environet)

Getting to grips with how to kill Japanese knotweed is vital if you have found this pesky plant growing in your garden.

Japanese knotweed (Fallopia japonica), as the name suggests, is native to Japan, as well as China and Korea, but was introduced to the UK during the Victorian era by plant hunters who were attracted by its pretty heart-shaped leaves and exotic-looking flowers. Little did they know, this is a plant now known for its aggressive growth and extensive root system that can, if left untreated, cause damage to buildings and roads. 

Natasha Brinsmead

Natasha is Homebuilding & Renovating’s Associate Content Editor and has been a member of the team for over two decades. An experienced journalist and renovation expert, she has written for a number of homes titles. Over the years Natasha has renovated and carried out a side extension to a Victorian terrace. She is currently living in the rural Edwardian cottage she renovated and extended on a largely DIY basis, living on site for the duration of the project. She is now looking for her next project — something which is proving far harder than she thought it would be.