At SE Knotweed, the knotweed map shows where Japanese knotweed is recorded across the UK alongside the areas we cover, so you can gauge the local picture before booking a survey.
Japanese knotweed is recorded in every part of the UK, so almost no area is entirely clear of it. It was introduced from Japan in the nineteenth century as an ornamental plant and spread from gardens and dumped soil, which is why it now turns up most along railway lines, riverbanks and canals, and on ground where soil has been moved.
Because it spreads from rhizome fragments rather than seed in most of the country, a single stand can travel with fly-tipped or reused soil to a plot that had none before. That is why a local record on a map cannot tell you whether one address is affected. Only looking at the plant can, which is what our free photo check and a survey are for.
We survey, treat and remove Japanese knotweed across England and Wales, and write the plan and guarantee in the form a mortgage lender accepts.