Japanese knotweed growth across a lawn

Japanese knotweed on a development site

Japanese knotweed can make a site economically unviable to develop. 

Recently we were commissioned to assess a residential development site that had been undergoing a knotweed herbicide treatment programme by another Japanese knotweed specialist for 7 years, to check whether the knotweed was eradicated prior to site purchase. Our client was looking to build fourteen houses on the site. 

Japanese knotweed rhizome underground system

Japanese knotweed removal techniques

Japanese knotweed can be controlled or removed in several ways.

In the winter, herbicide treatment is not an option as the plant is dormant, with no above ground growth. Japanese knotweed can still be physically removed during this time. Various removal techniques are available, depending on your budget, site conditions and time frame.