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Japanese Knotweed?

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  • 11-08-2019 3:28pm
    #1
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭


    Hi all

    Just wondering if someone can identify this. Is it Japanese Knotweed? from research it seems the leaves arnt the same shape and teh stems are inline which I believe means its not but Im not 100% sure.
    It started with just one last year and chopped it as I assumed it was just one big weed, it grew fairly high.

    Now we are left with this, multiple. The worry is they are now growing outside the flower bed. Any ideas? Should I be worried?
    Any help is appreciated.


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    #2
    RebelButtMunch
    Registered Users Posts: 2,383 ✭✭✭RebelButtMunch


    forzacalcio wrote: »
    Hi all

    Just wondering if someone can identify this. Is it Japanese Knotweed? from research it seems the leaves arnt the same shape and teh stems are inline which I believe means its not but Im not 100% sure.
    It started with just one last year and chopped it as I assumed it was just one big weed, it grew fairly high.

    Now we are left with this, multiple. The worry is they are now growing outside the flower bed. Any ideas? Should I be worried?
    Any help is appreciated.

    Not knot weed


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    #3
    recedite
    Closed Accounts Posts: 13,993 ✭✭✭✭recedite


    Might be Himalayan balsam which is another invasive species, but not as bad.
    Not knot weed.


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    #4
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    Thanks RBH and recedite, appreciate it, any tips on how to get rid?


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    #5
    lottpaul
    Registered Users Posts: 1,165 ✭✭✭lottpaul


    It's not balsam either -- can't recall the name now, but it is very invasive and grows very tall. Just pull out the biggest ones - unless its a very big area - and pull/spray off the smaller ones.


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    #6
    dathi
    Registered Users Posts: 1,405 ✭✭✭dathi


    looks like one of the salvias that has self seeded


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    #7
    LaChatteGitane
    Registered Users Posts: 790 ✭✭✭LaChatteGitane


    it's figwort.


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    #8
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    LaChatteGitane wrote: »
    it's figwort.

    What kind of spray can I get to get rid? Basic weed killer or something professional? Sorry very clueless about this kind of thing.


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    #9
    LaChatteGitane
    Registered Users Posts: 790 ✭✭✭LaChatteGitane


    forzacalcio wrote: »
    What kind of spray can I get to get rid? Basic weed killer or something professional? Sorry very clueless about this kind of thing.

    I can't advice you on that. I don't use poison on my land, ever.


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    #10
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 49,486 CMod ✭✭✭✭magicbastarder


    just keep yanking at it. if it's in a contained area, should be easy enough to keep on top of and you should be able to weaken it enough to kill it off.


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    #11
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    As said its Fig Wort which is one of those pain in the arse weeds that once you've got it is almost impossible to get rid of.

    If that stuff seeds you won't ever see the back of it.

    It might not be to late to use roundup on it but if it is too late the flowers will go on to produce seed.


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    #12
    Dtwhite123
    Registered Users Posts: 15 ✭Dtwhite123


    I have a similar question - are the attached photos Japanese Knotweed or something different? It keeps coming through tiny holes in a stone wall between my property and my neighbours field.

    Thank you!


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    #13
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    Dtwhite123 wrote: »
    I have a similar question - are the attached photos Japanese Knotweed or something different? It keeps coming through tiny holes in a stone wall between my property and my neighbours field.

    Thank you!

    Bind weed. Bit of a pain but not in the same league as Japanese Knotweed.

    I treat it with a Roundup mixed with wallpaper paste and paint the leaves.


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    #14
    Reckless Abandonment
    Registered Users Posts: 1,500 ✭✭✭Reckless Abandonment


    Dtwhite123 wrote: »
    I have a similar question - are the attached photos Japanese Knotweed or something different? It keeps coming through tiny holes in a stone wall between my property and my neighbours field.

    Thank you!

    Yep bind weed. If there isn't to much of it I advise dealing with it now. This time of year using round up is very effective. You can keep pulling it up if you don't want to use chemicals. But you'll need to pull at it every week or so, until it's gone. It's a real bugger


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    #15
    Dtwhite123
    Registered Users Posts: 15 ✭Dtwhite123


    Reckless Abandonment wrote: »
    Yep bind weed. If there isn't to much of it I advise dealing with it now. This time of year using round up is very effective. You can keep pulling it up if you don't want to use chemicals. But you'll need to pull at it every week or so, until it's gone. It's a real bugger

    Thanks for that. Relieved. I'll ask the neighbours permission if I can treat it with Round Up from his side.


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    #16
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    Dtwhite123 wrote: »
    Thanks for that. Relieved. I'll ask the neighbours permission if I can treat it with Round Up from his side.

    You can just paint the tips as they come through with roundup. Mixing roundup with wallpaper paste makes it easier to get it to stick. Beware that it will wash off an affect plants below.

    The new growths are also the best bits to treat as they pick up the glyphosate really well.


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    #17
    recedite
    Closed Accounts Posts: 13,993 ✭✭✭✭recedite


    my3cents wrote: »
    Beware that it will wash off an affect plants below.
    One good reason to treat it from the neighbour's side ;)


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    #18
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    recedite wrote: »
    One good reason to treat it from the neighbour's side ;)

    I can do ours from my own garden but because I have plants I want to keep I can't just spray all the Bind Weed. So I treat the leaves where they are over bare soil, on woody stems or on plants that don't really matter like fox gloves that have flowered.

    When its really dry like last summer there wasn't a problem but with all the rain this year the roundup can wash off before its all been absorbed.

    Getting some good kill rates and must get back when we have a couple of dry days forecast to do some more.


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    #19
    recedite
    Closed Accounts Posts: 13,993 ✭✭✭✭recedite


    I got rid of one by coiling it up inside a transparent plastic bag, and then spraying into the bag.

    It must have come in as a seed or something, because it was only the one plant, but every time I pulled it up it just came back. The roots are very deep.
    Anyway, I didn't want it spreading, and that's what they do.


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    #20
    my3cents
    Closed Accounts Posts: 9,764 ✭✭✭my3cents


    recedite wrote: »
    I got rid of one by coiling it up inside a transparent plastic bag, and then spraying into the bag.

    It must have come in as a seed or something, because it was only the one plant, but every time I pulled it up it just came back. The roots are very deep.
    Anyway, I didn't want it spreading, and that's what they do.

    I used to do that for the odd bind weed plant and it works well but I have a lot from cultivating a wild area and not getting it all out.


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    #21
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    Duplicate post


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    #22
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    Duplicate post


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    #23
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    my3cents wrote: »
    I used to do that for the odd bind weed plant and it works well but I have a lot from cultivating a wild area and not getting it all out.

    So these f****rs are back. My fear of them growing by house also seems to have happened as I've spotted two growing by house wall. I went to a few places around Cork and I was recommended to use RoundUp. Didn't work. So now I assume the only way out of this is to dig everything out? Can I do this myself or should I get someone who knows what they are doing to do it? They are multiply massivly every year. What started off as one in 2018 now there are about 40.

    Edit. Actually it's about 80. All over that flower bed


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    #24
    GinSoaked
    Closed Accounts Posts: 1,049 ✭✭✭GinSoaked


    LOL One of the Willowherbs no sign of Japanese Knotweed in that picture. A bit of roundup will get rid of those is short order.


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    #25
    New Home
    Moderators, Arts Moderators, Recreation & Hobbies Moderators, Social & Fun Moderators Posts: 76,825 Mod ✭✭✭✭New Home


    Just for the record, this is what Japanese knotweed looks like. :)


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    #26
    New Home
    Moderators, Arts Moderators, Recreation & Hobbies Moderators, Social & Fun Moderators Posts: 76,825 Mod ✭✭✭✭New Home


    This must be the weirdest suggestion I've ever seen regarding Japanese knotweed.

    http://the3foragers.blogspot.com/search?q=knotweed


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    #27
    magicbastarder
    Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 49,486 CMod ✭✭✭✭magicbastarder


    oh, i've heard it's edible on plenty of occasions. just not a plant you'd want to grow as a crop...


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    #28
    standardg60
    Registered Users Posts: 4,691 ✭✭✭standardg60


    forzacalcio wrote: »
    So these f****rs are back. My fear of them growing by house also seems to have happened as I've spotted two growing by house wall. I went to a few places around Cork and I was recommended to use RoundUp. Didn't work. So now I assume the only way out of this is to dig everything out? Can I do this myself or should I get someone who knows what they are doing to do it? They are multiply massivly every year. What started off as one in 2018 now there are about 40.

    Edit. Actually it's about 80. All over that flower bed

    Such an easy weed to just pull up.
    Get to them before they flower/ in flower and you'll eradicate them within a couple of years.
    Miss just one though and they'll be there forever so very important to look everywhere (especially amongst and under plants) for them.


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    #29
    forzacalcio
    Registered Users Posts: 1,440 ✭✭✭forzacalcio


    New Home wrote: »
    Just for the record, this is what Japanese knotweed looks like. :)

    My first photo (OP last year) looks very like Japanese Knotweed. I can't see the difference tbh. I know my latest ones aren't. I may have just panicked 🀣


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    #30
    GinSoaked
    Closed Accounts Posts: 1,049 ✭✭✭GinSoaked


    Last year it was figwort. I guess you didn't let the figwort go to seed or you'd have even more figwort this year.


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    #31
    New Home
    Moderators, Arts Moderators, Recreation & Hobbies Moderators, Social & Fun Moderators Posts: 76,825 Mod ✭✭✭✭New Home


    forzacalcio wrote: »
    My first photo (OP last year) looks very like Japanese Knotweed. I can't see the difference tbh. I know my latest ones aren't. I may have just panicked ��

    :)

    The leaves in that picture are smaller and with a different edge, they are attached to the plant differently and the stems are straight.

    Anyway, better to be panicking and be wrong (and if you're right, do something about it) than not to be panicking and be right (and ignoring the problem hoping it'll go away).


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