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Japanese knotweed

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Grammaretto Mon 20-Apr-26 12:18:08
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I'm about to put my house on the market and have identified a crop of JKW at the far end of the garden ground
It's a wet area so probably extends beyond my garden, following the nearby riverside.
It's a good distance from my house and has been there for years and not bothered us.

I have had a quote for a survey of £500 and who knows what the actual cost of removal would be.

My friend tells me to attack it with systemic weedkiller and so deal with it myself.

Any advice welcome?
It's just coming out now, looking innocent and pretty among the wild garlic and goose grass .

I'm also told if you pretend you haven't got it and sell the property, the buyers could sue me for a hefty fine.

My home report last year didn't pick it up but I now have to have a new report.

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Grandmabatty Mon 20-Apr-26 12:25:51

Weedkiller won't get rid of it. You have to get it removed properly I'm afraid.

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Aldom Mon 20-Apr-26 12:31:23

Hi Grammaretto. I see there is good advice via Google regarding Japanese knotweed. You have an expensive problem I'm afraid. flowers

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Sarnia Mon 20-Apr-26 12:38:13

Don't pretend you don't know it's there. That could come back to haunt you. As Aldom recommends, look on Google. Cheaper than a survey which would probably tell you the same thing anyway.

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dalrymple23 Mon 20-Apr-26 15:05:02

We had it and, despite it being next door's weed, not ours, and being at the far end of the garden and despite the fact that the next door neighbour was paying for a specialist firm to destroy it and it was on the sales declaration form, we lost £80,000 on the sale of the house. Scientific studies have shown that (a) the leaves are edible and (b) it is not as pernicious as it is made out to be (please don't ask when \I read it, as it was several years ago in the DT)!

The commercial firms will not only destroy the weed but all surrounding vegetation. You need to really find the source - it could be someone else's issue. If there is only a small amount, one way of dealing with a local infestation is to cut through the hollow stems and inject them with a powerful, concentrated weedkiller. It worked for me!

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