Japanese Knot Weed (Merged)

edited 30 November -1 at 1:00AM in Greenfingered MoneySaving
69 replies 24.8K views
frugglewumpfrugglewump Forumite
680 Posts
edited 30 November -1 at 1:00AM in Greenfingered MoneySaving
I have just cleared my garden (all 5 by 20 flagstones) of Japanese knotweed - again! I had to lever up each stone and dig out all the roots by hand. The problem is that is always comes back because the main root is under next door's graden and when they got someone in to remove all the weed & concrete over it they left the roots behind.

I looked at weedkillers to try and stop the roots coming back - they are so expensive and I have a large area to cover I'd need about 10 bottles!
Any old-style remedies? I've tried salt before but it didn't work.

Still wish I could buy a TARDIS instead of a house!


  • squeakysqueaky Forumite
    14.1K Posts
    10,000 Posts Combo Breaker I'm a Volunteer Board Guide
    In the Food section of the MEGA Index sticky at the top of the forum listing you'll find some threads on weedkillers listed in the Grow Your Own bit.
    Hi, I'm a Board Guide on the Old Style and the Consumer Rights boards which means I'm a volunteer to help the boards run smoothly and can move and merge posts there. Board guides are not moderators and don't read every post. If you spot an inappropriate or illegal post then please report it to [email protected]. It is not part of my role to deal with reportable posts. Any views are mine and are not the official line of MoneySavingExpert.
    Never ascribe to malice that which is adequately explained by incompetence.
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  • Oh look it's vinegar again.

    I hope this works - apparently Japanese knotweed is a "notifiable" pest. We told the environmental people at the council & the landlord - who told the freeholder - all of whom went "oh sh*t" becuase this stuff can go straight through concrete & it's a bit close to the house. Nobody did anything though.
    Still wish I could buy a TARDIS instead of a house!
  • Our local civic amenity cenre wont even let anyone tip it there its such a nuisance!
    When we sold our last house somebody viewing said we had a "tardis shower" might be a bit wet tho!
    Annual Grocery budget 2018 is £1500 pa £125 calendar month £28.84 pw for 3 adults
  • Sorry to hear you have this plant in your garden. You have a potentially serious problem looming and it won’t go away on its own. The following site provides a good description of this invasive plant, along with information of treatments, chemicals, legal obligations and so on. It is a commercial site and I’m in no way advocating the use of their services – just referring it for the information they provide. Hope this is of use to you.

    :) The £2 Coin Savers Club = £346.00 (£300.00 transferred to Savings a/c)

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  • se999se999 Forumite
    2.4K Posts
    It's not just you having the problem. Spotted this BBC News article a while ago. It's causing problems for the 2012 Olympics and also delaying a major road project. There's a bit more info on the weed itself:


    There's also a link the 'Japaneese Knotweed Alliance' and the site does recommend specific types of weed killers and means of control.

    423 Posts
    Anybody had any success with trying to get rid of this "dreaded" weed using organiC methods. If not, anybody had any success in getting rid of it by ANY MEANS?:mad:
    There are three ways to get something done; do it yourself, hire someone or forbid your kids to do it.
  • ariba10ariba10 Forumite
    5.4K Posts
    Part of the Furniture 1,000 Posts Combo Breaker
    You can not get rid of it even useing non organic methods short of burning every part of the plant.
    I used to be indecisive but now I am not sure.
  • se999se999 Forumite
    2.4K Posts

    There was a thread a while ago in Old Style, I put some links on it as did some others.

  • Ken68Ken68 Forumite
    6.8K Posts
    Part of the Furniture 1,000 Posts Energy Saving Champion Home Insurance Hacker!
    Japanese knotweed is a wild edible. Young shoots up to one foot in height can be harvested early in the spring, then steamed or boiled for four to five minutes and served like asparagus. Slightly older stems can be used to make a rhubarb-like jam by peeling and boiling the sour rind with sugar and pectin.
    Now you know.
  • Debt_Free_ChickDebt_Free_Chick Forumite
    13.3K Posts
    The Japanese Knotweed Alliance is probably the best source for information on this nuisance
    Warning ..... I'm a peri-menopausal axe-wielding maniac ;)
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