Solutions 4 Japanese Knotweed (S4JK) is a small but experienced team of Certified Surveyors for Japanese Knotweed (CSJK). The team has NPTC, PA1, PA6 and PA6AW qualifications for spraying Japanese Knotweed with herbicide, and also PA6 (INJ) for stem injecting, where spraying cannot be carried out.

Our team works with clients, from identification of the problem to the solution and the after-care. Japanese Knotweed has an invasive root system, also known as a Rhizome, which is active all year round even though the stems above the ground die back in the winter. It has incredibly strong growth and can damage concrete foundations, buildings, paving and retaining walls, so it is crucial that remedial help is sought quickly so as to prevent further damage and costs.


As well as Japanese Knotweed, we can also deal with other invasive weed species, such as Giant Hogweed and Himalayan Balsam, offering bespoke treatment plans.

Treatment services >>

Japanese Knotweed Solutions for private property
Japanese Knotweed Solutions for commercial property
Japanese Knotweed Solutions for brownfield site clearances
Japanese Knotweed Solutions for parks and public spaces