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japanese knot weed

I have japanese knotweed in the corner of my garden it is coming from the garden at the back of my house but it is spreading down my garden I was wondering as the stems seem dead can I cut them down




  • LynLyn Posts: 23,047
    Some time ago it was feared that this stuff was going to become a real pest and people were asked to contact their local council if they saw it. I dont know if they re still doing that, they used to come straight away and kill it.

    Maybe worth a phone call?
    Gardening on the wild, windy west side of Dartmoor. 

  • prob cut it dwn to bottom,then dig some of it out then spray with weed killer rd website says hard to get rid of it maybe flame thrower too wet thou

  • Yes think you need advice from someone knowledgeable, can be quite tricky I believe. I read that it's better to keep pulling it up rather than cutting, maybe a little googling?

  • artjakartjak Posts: 4,167

    I would contact the Council; maybe they could get your neighbour to deal with the problem in their garden, otherwise it will always be coming through.

  • WelshonionWelshonion Posts: 3,114

    I understasnd the best time to tackle it is in the late summer/ autumn as it dies down by injecting weed killer directly into the hollow stem just above the roots.

    You will never defeat it by pulling it up as there will be re-growth from every bit that's left in the ground. Suimilarly you cannot eradicate it by digging it up.

    Do what you can to keep the growth weak until you can tackle it in the autumn. 

  • I'm sorry to be the bearer of bad news - but Japanese Knotweed is proving to be a really serious problem in the UK now, even though it was apparently introduced as an "ornamental" in the past. If you find it, you are supposed to inform your local authority, as it is classed as a "notifiable weed".  If it is found on your property, this can seriously affect the property's value, as most lenders will not authorise a mortgage where Japanese Knotweed is present, and because it can affect neighbouring properties (as in your case) it's possible that other legal situations can arise. 

    Before doing anything else, I'd suggest you google "Japanese knotweed".  There are lots of websites which explain the situation as regards the position you inadvertently find yourself in, and there are sites which can help explain ways to try to eradicate the plant itself.

  • artjakartjak Posts: 4,167

    Hyper C F is right, it is very serious and you need to do proper research on it.

  • SwissSueSwissSue Posts: 1,447

    We got rid of ours by doing as Sam12 said, spray, spray and spray again, it took almost a year, but it's gone! But you must report it and get your neighbour to cooperate.

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