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Japanese knotweed in Warrington gardens: where it comes from and what to do

Why knotweed turns up in Warrington gardens near canals, rivers and railways, and the first steps to take if you find it.

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Japanese knotweed in Warrington gardens: where it comes from and what to do

Warrington is criss-crossed by the Mersey, the Manchester Ship Canal, the Sankey and Bridgewater canals and several main railway lines. Those corridors are where Japanese knotweed spreads most easily, and gardens that back onto them are the ones most often affected.

How it arrives

Knotweed spreads from fragments of rhizome and stem, not seed. Fragments travel in water, in soil moved during building work and on machinery. A stand on the other side of a fence can send rhizome under it.

First steps

Do not cut, strim or dig it. Take photos of the whole plant, a leaf and a stem, and get it identified. If it is knotweed, a survey shows how far it goes and what treatment will cost.

Quick answers

Should I tell my neighbours?
If it is near a shared boundary, yes. Dealing with both sides at once is more effective and avoids disputes later.
More guides
Selling a Warrington house with Japanese knotweedWhat the TA6 form asks, what buyers' lenders want to see, and how a management plan keeps a sale moving.Knotweed or bindweed? How to tell the differenceThe quickest ways to tell Japanese knotweed from bindweed and other common look-alikes in a Warrington garden.
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