Japanese Knotweed on Private Land
Neither we nor Natural Resources Wales are obliged to control Japanese knotweed on behalf of other landowners. It is the landowner's responsibility to control Japanese knotweed on their land if it is affecting neighbouring land.
The persistence of Japanese knotweed rhizomes makes the plant hard to eradicate; you will need to treat Japanese knotweed for a number of years, even though you may think you have killed it after the first treatment
Whichever management approach is decided upon, regular monitoring of the area should be undertaken to ensure the knotweed is not spreading elsewhere or contaminating watercourses.
Please Note: Mowing and flailing Japanese knotweed will cause it to spread. Do not compost or chip Japanese knotweed