NO, it’s is not illegal to have Japanese knotweed in your garden but they’s some important things you need to know about keeping Japanese Knotweed on your land.
A amendment to the Anti-social Behaviour, Crime and Policing Act 2014 includes Japanese knotweed and other invasive non-native plants, here are the key points:
If you have Japanese Knotweed or anyother plant classed invasive such as Himalayan balsam and giant hogweed you should aim to control the plant and prevent them becoming a problem in your neighbourhood. If they have a “detrimental effect of a persistant or continuing nature on the quality of life of those in the locality”, the new legislation can be be used to force land owner to control the problem.
Plant control can be carried out by the property owner and DOES NOT require a specialist company. Please bear in mind that failure to control invasive weed can land you in hot water, this is why the contracting of a specialist qualified company will pass liability from the proeprty owner to the company.
NOTE: Most if not all mortgage lenders will not authorise loans where Japanese Knotweed is present and without a professional control program inplace run by a quilifed business.
For more information, see the Home Office Information Note: Japanese knotweed.