Japanese Knotweed - how to kill?

TomOnBoard

Redsoxfan wrote: »

Is this Japanese Knotweed?

Is it wrapping around other plants or growing on top of them?

Someone else may have a better eye but there's the look of bindweed about it ro me.

Redsoxfan

TomOnBoard wrote: »

Is it wrapping around other plants or growing on top of them?.

No, I don't see that it is.

Base price

Redsoxfan wrote: »

No, I don't see that it is.

This might help. Click on the left hand side where the pictures are in the link.
https://www.knotweed.ie/resources/plant-identification-sheets/
After looking at the pictures, the leaves should grow in a zig/zag formation. The leaves on your pic don't. As Tom On Board suggested probably bindweed.

Robert146

dryan wrote: »

Started of with a small infestation 2 years ago in a beech hedge at the road entrance to the home place.
Was out trimming the hedge earlier in the week and i see thats its spreading at an alarming rate along the hedge on the site boundary.

Also starting to notice it in the farm boundary fences as well.

Is there any product out there that will kill it?

Japanese knotweed is not difficult to eliminate by dock spray. It cannot tolerate being trampled on and will not grow across fields. The root system is shallow and pulling it and then spraying it around this time as it tries to recover will seriously weaken it and then finish off any stragglers next year. Himalayan knotweed cannot be easily pulled, but also responds to dock spray.

Summer2020

https://ibb.co/MGqpbkn
https://ibb.co/XbPb9vL
https://ibb.co/X3fVHyf
https://ibb.co/x8sZrc8

Have I got Japanese knotweed ? Bought a house and just noticed this. There’s similar growing against the boundary fence of the neighbours (extremely long and overgrown back garden).
The previous owner has placed a plant support frame holding it up , can be seen in one of the photos. So I’m hoping it’s not knotweed, but fearful it is.

Lady Haywire

Summer2020 wrote: »

https://ibb.co/MGqpbkn
https://ibb.co/XbPb9vL
https://ibb.co/X3fVHyf
https://ibb.co/x8sZrc8

Have I got Japanese knotweed ? Bought a house and just noticed this. There’s similar growing against the boundary fence of the neighbours (extremely long and overgrown back garden).
The previous owner has placed a plant support frame holding it up , can be seen in one of the photos. So I’m hoping it’s not knotweed, but fearful it is.

Don't know what it is, but it's not knotweed so you can relax.

GreeBo

Lady Haywire wrote: »

Don't know what it is, but it's not knotweed so you can relax.

I cant remember the name of it, but my parents have some, grows like billy-oh if you cut it back, but not knotweed alright.

Danzy

Summer2020 wrote: »

https://ibb.co/MGqpbkn
https://ibb.co/XbPb9vL
https://ibb.co/X3fVHyf
https://ibb.co/x8sZrc8

Have I got Japanese knotweed ? Bought a house and just noticed this. There’s similar growing against the boundary fence of the neighbours (extremely long and overgrown back garden).
The previous owner has placed a plant support frame holding it up , can be seen in one of the photos. So I’m hoping it’s not knotweed, but fearful it is.

Forsythia.

Mass of yellow flower in early spring. Great for bees that come out early.

Not a problem plant

Summer2020

Appreciate the responses, this is another part of the neighbours boundary. Looks very like knotweed to me, it has the same heart shaped leaf and seeds . Would anyone know? (Last question I promise)


https://ibb.co/DRZ8KhH
https://ibb.co/bzFF7j4
https://ibb.co/W364rr9

fits

Thats not knotweed

NcdJd

Summer2020 wrote: »

Appreciate the responses, this is another part of the neighbours boundary. Looks very like knotweed to me, it has the same heart shaped leaf and seeds . Would anyone know? (Last question I promise)


https://ibb.co/DRZ8KhH
https://ibb.co/bzFF7j4
https://ibb.co/W364rr9

That's a lilac tree.

Summer2020

Thanks a lot, need to brush up on my botanical knowledge.

Danzy

Summer2020 wrote: »

Thanks a lot, need to brush up on my botanical knowledge.

Go to Google play store and search for PlantNet, it's an app that will exam a photo and tell you what the plant is.

TomOnBoard

Summer2020 wrote: »

Thanks a lot, need to brush up on my botanical knowledge.

Maybe also not just assume your neighbour is growing noxious weeds.

Summer2020

TomOnBoard wrote: »

Maybe also not just assume your neighbour is growing noxious weeds.

No need for the snarky comment at all. Just looking for some advice, which thankfully all other posters gave without judgement.

Summer2020

Danzy wrote: »

Go to Google play store and search for PlantNet, it's an app that will exam a photo and tell you what the plant is.

Very useful app thanks

TomOnBoard

Summer2020 wrote: »

No need for the snarky comment at all. Just looking for some advice, which thankfully all other posters gave without judgement.

You posted one set of photos 'fearful' that your neighbour's boundary had knotweed in it. You were advised it was not knotweed. You then posted another set, that "looks very like knotweed" to you. Again, you were told it was not knotweed.

It appears that you are actively searching your neighbours for knotweed. You clearly have a problem with how they've managed (or not) their property - " extremely long and overgrown back garden"- That seems strange to me. If I had recently moved in and wondered about stuff thats growing, I'd be asking my new neighbour in a very nice, non-confrontational way, what kind of plants are those in the boundary. If you thought that my comment was snarky, I 'm sorry you feel that way.

zac8

Would any of you be put off buying a property that had knotweed growing on the site? I’ve seen a property I’m interested in with knotweed growing about 30 feet from the building. The costs for getting professionals in seems prohibitive but some of you here seem to be having success removing it yourselves. Am I mad to consider buying it?

Mooooo

Yes, if going for mortgage as far as I know the bank won't give one if it's on the site

zac8

Mooooo wrote: »

Yes, if going for mortgage as far as I know the bank won't give one if it's on the site

Sorry should have said I’m a cash buyer.

Bass Reeves

zac8 wrote: »

Sorry should have said I’m a cash buyer.

It would all depend on the value I was getting it for. If the numbers stack up anything is worth the risk.

TomOnBoard

zac8 wrote: »

Would any of you be put off buying a property that had knotweed growing on the site? I’ve seen a property I’m interested in with knotweed growing about 30 feet from the building. The costs for getting professionals in seems prohibitive but some of you here seem to be having success removing it yourselves. Am I mad to consider buying it?

Personally, I'd have my surveyor check to ensure that foundations and other structural elements have not been impacted already. If that passes muster, then I'd want a healthy discount on the price, and would be happy to proceed and factor in remediation as a priority item.

punisher5112

There is a house in churchtown for sale on Beamount avenue where the wall is covered in it. Its grown out so much it's even covered the warning sign to state there is a concealed entrance.
Its out on the road way restricting larger vehicles in passing too.

cosbawn

zac8 wrote: »

Would any of you be put off buying a property that had knotweed growing on the site? I’ve seen a property I’m interested in with knotweed growing about 30 feet from the building. The costs for getting professionals in seems prohibitive but some of you here seem to be having success removing it yourselves. Am I mad to consider buying it?

Hi there. I am very successfully treating a fine batch of JKW which is across the road from my house. Thanks to all the help I got here ! Only a tiny patch grew this summer and that was because I just couldn't get near it due to overgrowth of briars last August. First spray was in August 2017 if memory serves me right and it was towering up over my head, I almost got lost in it. So not bad going. I keep a close eye on it though.

Would you actually have to get rid of this patch of JKW or could you just treat it ? Is it in the way of putting in a septic tank or extension ? If not you could just treat the area and cordon it off to ensure you don't disturb the soil.

I was a bit panicked at first when I saw JKW so close to me but now I'd actually be interested in buying that field if it came up for sale ! I'd say go for it if the price is right !

zac8

cosbawn wrote: »

Hi there. I am very successfully treating a fine batch of JKW which is across the road from my house. Thanks to all the help I got here ! Only a tiny patch grew this summer and that was because I just couldn't get near it due to overgrowth of briars last August. First spray was in August 2017 if memory serves me right and it was towering up over my head, I almost got lost in it. So not bad going. I keep a close eye on it though.

Would you actually have to get rid of this patch of JKW or could you just treat it ? Is it in the way of putting in a septic tank or extension ? If not you could just treat the area and cordon it off to ensure you don't disturb the soil.

I was a bit panicked at first when I saw JKW so close to me but now I'd actually be interested in buying that field if it came up for sale ! I'd say go for it if the price is right !

Thanks for that, very helpful. It wouldn’t need to be removed as its not in the way. Some of it is growing near a boundary so it probably means its also in the adjacent site which is owned by Coillte. That’s probably a bigger concern.

TomOnBoard

zac8 wrote: »

Thanks for that, very helpful. It wouldn’t need to be removed as its not in the way. Some of it is growing near a boundary so it probably means its also in the adjacent site which is owned by Coillte. That’s probably a bigger concern.

if you can be sure that its in the Coillte site, I'd imagine they'd be willing to eradicate it and all its outgrowths/spread..

bifl

Have I left it late enough to go spraying with roundup. I know the roundup says wait till Aug/Sept and flowering and 1-1.5m high. Mine are small however on first year growth so at best 30cm high some are 15cm and less, I'm wondering will they flower at all and I've left it late enough in the year to spay.

TomOnBoard

bifl wrote: »

Have I left it late enough to go spraying with roundup. I know the roundup says wait till Aug/Sept and flowering and 1-1.5m high. Mine are small however on first year growth so at best 30cm high some are 15cmideal and less, I'm wondering will they flower at all and I've left it late enough in the year to spay.

Ideal time because the plants will be starting to store its food in the roots before the tops go into senescence. Great weather right now with the high pressure over the country and threat if rain reduced..

Nekarsulm

bifl wrote: »

Have I left it late enough to go spraying with roundup. I know the roundup says wait till Aug/Sept and flowering and 1-1.5m high. Mine are small however on first year growth so at best 30cm high some are 15cm and less, I'm wondering will they flower at all and I've left it late enough in the year to spay.

I'd hit it now.
Weather is good and fairly settled, and any I'm watching has lots of greenery still.

bifl

Nekarsulm wrote: »

I'd hit it now.
Weather is good and fairly settled, and any I'm watching has lots of greenery still.

So don't worry about waiting for flowering, as I say mine might be too small even to do that