Japanese Knotweed

What does it look like?

A perennial weed that grows quickly with bamboo-like shoots growing up to 2.1m tall in the spring and summer. It has zig-zag shaped canes with purple flecks, triangular leaves up to 14cm in length and creamy-white flower tassels reaching up to 15cm in length in the summer and early autumn.

Where is it found?

Japanese knotweed is commonly found in urban areas, on waste ground and along river banks, usually in full sunshine.

Why is it a problem?

Japanese knotweed can form dense stands which out compete native flora. The root system (rhizomes) of the plant spreads widely and rapidly through the soil, suppressing growth of other plants. It can grow into building foundations and drainage systems where a structural fault is already present, greatly devaluing property and often causing problems with conveyancing.

How do we deal with it?

Our PCA Certified Surveyor of Japanese knotweed can carry out a comprehensive survey of the site and neighbouring properties to assess the extent of the infestation and identify any potential constraints to management. We can produce a Management Plan to determine the most appropriate method of control, including a schedule of recommended control operations supported by detailed maps. Our specialist in-house technicians are trained and experienced in carrying out the recommended control operations.