Japanese knotweed
Canes have been cut to stumps along the fence. Does a winter visit with no leaf prove the plant has gone?
No. Cut stumps and a winter visit with no leaf do not prove Japanese knotweed has gone. The plant is often cut back, and the crown and rhizome stay in the ground when the canes are shortened and the leaves have died away. A winter survey records what is above ground that day: stumps along the fence, not a cleared site. The survey did not excavate and did not test the soil. A missing green leaf is the season, not proof of eradication. The report has not decided the plant is dead.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Knotweed dies back with the seasons. In winter you may see crowns, stumps or bare soil where summer would show tall canes. Cutting to the fence is also a common way to tidy a garden before a sale. Neither the season nor the cutting removes what is underground. Stumps alone can be harder to identify than a full cane, which is a reason not to upgrade them into a clearance. The survey can record suspicious stumps. It cannot certify that nothing viable remains in the ground.
Tell your solicitor about the stumps and that a winter visit did not prove removal. If a treatment programme is claimed, ask for the records and any guarantee, and have someone who knows the plant read them. This survey has not checked a treatment history and has not said the fence line is clear. A lender asking about knotweed should hear that cut canes were present and the plant was not shown to be gone. A visit in the growing season sees more than this one could.
What should you ask your surveyor?
- Does the report name the stumps as knotweed, or leave the canes unidentified?
- Is there a treatment guarantee in the pack that names this fence?
- Were the cuts fresh, or were the stumps old and weathered?
What are the typical next steps?
- Do not treat bare winter stumps as proof the plant has gone.
- Ask the seller for any knotweed plan and guarantee.
- If a lender wants more certainty, instruct a specialist. This visit did not dig.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If the stumps are not confirmed as knotweed, has the garden been cleared?
Only of what could be identified on the day. A winter look at cut growth is limited. If the report stops short of naming knotweed, it has not proved some other cane either, and it has not issued a clear result for every bed. Read that limit. Do not widen it into a clean garden.
Can treatment invoices replace a look at the crowns?
Invoices matter, and they are not a substitute for what is still in the ground. The survey has not checked a contractor's visits. A specialist can compare the paperwork with the stumps. Until that is done, papers do not prove the plant has gone, any more than a leafless fence does.