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Is this the dreaded Japanese Knotweed!! Ident and advise required


Hi, I have just come across this in a garden, have I correctly identified it as Japanese Knotweed, if so what is the next course of action as gardeners are not yet allowed to chemically treat it. image



  • artjakartjak Posts: 4,167

    Need to see the leaves Paul.

  • hmm, it doesn't have any on at the moment. 

  • nutcutletnutcutlet Posts: 27,349

    Has a resemblance to Leycesteria formosa.

    But as artjak says, we need to see the leaves. Shape of the whole plant and its base would be good as well

    In the sticks near Peterborough
  • DovefromaboveDovefromabove Posts: 86,863

    Don't think it's Knotweed - the dreaded JK has shoots and leaves growing alternately from each side of the stem - yours looks as if the shoots are growing in pairs.  

    Are there any leaves we can have a look at?

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.

  • artjakartjak Posts: 4,167

    Dove, do you know if JKWeed has slightly reddish stems?

  • SalinoSalino Posts: 1,609

    ..nothing like Knotweed...   might be Fennel..?

  • artjakartjak Posts: 4,167

    Paul, where did you hear that gardeners cannot chemically treat it?

  • FairygirlFairygirl Posts: 54,348

    I think the stems are a bit redder on JK.  Is there a lot of it Paul, and what sort of height is it just now?

    It's a place where beautiful isn't enough of a word....

    I live in west central Scotland - not where that photo is...
  • Yes leycesteria formosa does look familiar in the photos but so does JK. Does leycesteria formosa have multiple stems at the base like Japanese knotweed, she said that she thought a neighbour had some JK a while ago. 

    Ah well spotted DFA, so JK does not have leaves in pairs. Ok so I think we might be onto something. I might have to go back to get more photos, I shall take photos of the base, any leaves and stems. 

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