Japanese Knotweed
This plant forms dense stands with hollow stems that can reach 3 metres tall. Its leaves are large, green and heart-shaped. Towards the end of August, clusters of cream flowers can be seen.
Responsibility for knotweed control usually lies with the landowner or tenant of the land. Knotweed has to be controlled carefully as even tiny amounts of cut stem, crown or underground stem can re-grow and help spread this weed. Knotweed must not be strimmed, flailed or mown, do not chip knotweed material or add knotweed to compost, as it will cause it to spread. The herbicide glyphosate is an effective way to control knotweed, but if you intend to use a herbicide in or near water, you need to obtain the approval of the Environment Agency first. It is also important to follow manufacturer’s instructions regarding protective clothing and safe herbicide use.
Download an advisory leaflet for more information on identifying and controlling knotweed (PDF, 341 KB). For further advice on controlling knotweed, contact the Environment Agency on 08708 506 506 (Mon-Fri, 8am-6pm).
Chesham Town Council is working with the Chilterns Conservation Board to map this weed. If you have seen these plants growing in Chesham, please contact Kathryn Graves on policy@chesham.gov.uk.
Related Documents
Japanese Knotweed Leaflet (knotweed leaflet08.pdf)This 341 KB PDF is an advisory leaflet on Japanese Knotweed, produced by the Impress the Chess partnership. Find out about knotweed and the law, how to identify, control and dispose of this invasive weed.
