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Japanese knotweed shoots & Mower contamination ?

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  • Thanks - I'm hoping that you are correct (unless of course that is also a problem plant!) image

  • I agree with Muddy Fork. Looks like bindweed (calystegia sepium) to me too, David. A common, perennial weed that's a pain but relatively straightforward to deal with. If you do a search on the forum you'll find plenty of suggestions, tips and tricks for dealing with it! I think mowing will weaken it if you keep it up, anyway  image   Shame it's so prolific as the flowers are actually quite nice!!

     

  • Lupin 1Lupin 1 Posts: 8,916

    Will folks please look at Newbie Gardener 2014 post about at weed, think that is KW.  

  • fidgetbonesfidgetbones Posts: 17,614

    For bindweed in a lawn, you could keep mowing. If you do that every three days it will give up eventually.

    Or you could use glyphosate gel stick  and paint on the leaves, but then you cant mow it until it has gone brown.

  • At RHS Wisley, I believe they plant a wooden post close to any bindweed for it to wrap around and grow up. They then treat it with a weedkiller (rubbed directly onto the leaves rather than spraying) which then goes down and kills the roots. Whilst bind weed is a nuisance its not the nightmare that Japanese Knotweed is. You'll be glad to know that there's no need to lose any sleep!  

  • Hostafan1Hostafan1 Posts: 34,887

    mercifully I've never had to deal with Knotweed, however I did  read of one control method with , allegedly , good result. Cut the stems to expose the hollow centre, then apply concentrated glyphosate ( roundup ) into those hollow stems. I guess you'd need a very small funnel or an eye dropper. 

    Devon.
  • Thanks all. I am now very convinced that the photos above are bindweed, however on a less positive note, we have also definitely found knotweed on another part of the garden image

    I've been reading up on it and is the concensus that it is better to treat with glyphosate repeatedly rather than trying to dig it up? Currently the shoots are only a few inches high and still red. Is it best to treat while it is so small?

  • DovefromaboveDovefromabove Posts: 88,128

    Oh yes!!!  Start as you mean to go on!!! image


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





  • I've seen on the TV (Country File, I think it was) an expert control Knotweed by cutting the Knotweed down in height to reveal the hollow stems and then injecting weedkiller (no idea which one) into the stem itself.

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