| Page 1 of 2 | 1 | 2 |
|
|
Knotweed
I've read everything I can find online about Japanese Knotweed but I
wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated |
Knotweed
"Stuart Noble" wrote in message m... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated As it can push its way up through tarmac, I can't see plastic sheeting being an effective barrier. And thick concrete won't be a barrier unless it goes down several metres. You can try repeated applications of glyphosate, especially as you say it won't have anything done to it for a year. Other possibilities include the path weed suppressants (most of which have been removed from the market), but in my experience they weren't as effective as glyphosate. There are some products around such as Weedol Rootkill Plus or Bayer Path Weedkiller which might be more effective. Or you could try Sodium Chlorate. Good luck! -- Jeff |
Knotweed
Stuart Noble wrote:
I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated It's been known to cross underneath tarmac roads so I understand. Good Luck Don |
Knotweed
On Mon, 15 Feb 2010 09:41:28 -0000, Stuart Noble
wrote: I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated It may be worth your while having a look at the advice on http://www.cornwall.gov.uk/default.aspx?page=13803 -- rbel |
Knotweed
"Stuart Noble" wrote in message
m... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated Hi Stuart, When we moved to this house and garden nearly 30 years ago, there were two or three stands of Japenese Knotweed. At that time, I didn't know what it was, just that it was a menace. We called it Doomweed then, and still do! I spent a couple of years doing nothing in the garden but digging it out .. waiting for it to reappear .. digging it out ... Eventually, I got to the point where it was considerably weakened, but some furled red shoots still appeared. Whilst in this weakened state, we liberally blasted it with glyphosate, firstly as directed, then neat. We got rid of it! :~). There is no really effective way of eradicating it, except blood, sweat and tears followed by Glyphosate. If it's in your neighbour's garden too and they're not willing to shift it, then I'm afraid you're doomed. Moving house is probably easier :~(. Alas, I have noticed a huge stand of Jap. Knotweed in my rear neighbour's garden. I'm watching it very, very carefully. *Gulp* :~( -- Spider from high ground in SE London, gardening on clay. |
Knotweed
In article , lid
says... "Stuart Noble" wrote in message m... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated Hi Stuart, When we moved to this house and garden nearly 30 years ago, there were two or three stands of Japenese Knotweed. At that time, I didn't know what it was, just that it was a menace. We called it Doomweed then, and still do! I spent a couple of years doing nothing in the garden but digging it out .. waiting for it to reappear .. digging it out ... Eventually, I got to the point where it was considerably weakened, but some furled red shoots still appeared. Whilst in this weakened state, we liberally blasted it with glyphosate, firstly as directed, then neat. We got rid of it! :~). There is no really effective way of eradicating it, except blood, sweat and tears followed by Glyphosate. If it's in your neighbour's garden too and they're not willing to shift it, then I'm afraid you're doomed. Moving house is probably easier :~(. Alas, I have noticed a huge stand of Jap. Knotweed in my rear neighbour's garden. I'm watching it very, very carefully. *Gulp* :~( It is now an offence to do nothing about it so if you like your neighbours point that out tactfully, if you don't like them drop them in it with Defra! -- Charlie Pridham, Gardening in Cornwall www.roselandhouse.co.uk Holders of national collections of Clematis viticella cultivars and Lapageria rosea |
Knotweed
"Charlie Pridham" wrote in message
T... In article , lid says... "Stuart Noble" wrote in message m... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated Hi Stuart, When we moved to this house and garden nearly 30 years ago, there were two or three stands of Japenese Knotweed. At that time, I didn't know what it was, just that it was a menace. We called it Doomweed then, and still do! I spent a couple of years doing nothing in the garden but digging it out .. waiting for it to reappear .. digging it out ... Eventually, I got to the point where it was considerably weakened, but some furled red shoots still appeared. Whilst in this weakened state, we liberally blasted it with glyphosate, firstly as directed, then neat. We got rid of it! :~). There is no really effective way of eradicating it, except blood, sweat and tears followed by Glyphosate. If it's in your neighbour's garden too and they're not willing to shift it, then I'm afraid you're doomed. Moving house is probably easier :~(. Alas, I have noticed a huge stand of Jap. Knotweed in my rear neighbour's garden. I'm watching it very, very carefully. *Gulp* :~( It is now an offence to do nothing about it so if you like your neighbours point that out tactfully, if you don't like them drop them in it with Defra! -- Charlie Pridham, Gardening in Cornwall www.roselandhouse.co.uk Holders of national collections of Clematis viticella cultivars and Lapageria rosea Could be interesting! One of those neighbours may be the local council, as well as one or two residents. The council certainly ought to know better; more importantly, they ought to know the law! I'll have to investigate who owns what ... Thanks, Charlie. Spider |
Knotweed
"Charlie Pridham" wrote ... says... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated Repeated applications of Glysophate are your best bet, the NT cut the stems during its growing season and squirt glysophate down the hollow stems, there are web sites where information and advice can be found but I fortunately do not have this problem. Plastic sheet would last less than a week and it would be through, I have seen it come up in the middle of roads and through 3" of concrete. I have seen some reports of mowing it twice a week weakening it but have wondered what you do with the mowings as its an offence to dispose of any part of the plant without a licence! I've seen articles saying the young 8 inch shoots are edible and delicious, like Rhubarb but better, and that if you keep cutting them off so the plant cannot photosynthesise it eventually dies. How long that takes is anyone's guess. Personally I would use the Glyphosate down the cut stem method to kill those deep roots and dry and burn the cut stems. -- Regards Bob Hobden W.of London. UK |
Knotweed
On Mon, 15 Feb 2010 20:04:10 -0000, Stuart Noble
wrote: Thanks everybody. The plastic sheet idea doesn't sound promising then, but I might try a damp course membrane weighted down with paving slabs. I would guess there are always weaknesses in concrete and tarmac, and maybe the uniformity of the polythene would make a difference. I'd probably be doing this anyway to discourage normal weeds, so there's nothing lost if it doesn't work. Stuart, if as you said in your first post you are going to leave the garden for a year, you really do need to do something about the knotweed *before* you cover it. If you don't, the infestation will be worse, much worse in a year's time. Even if the shoots do not manage to pierce the membrane, the roots will continue to multiply both directly under the garden and sideways beneath the surounding concrete areas. Knotweed has even been known to bury under house foundations and come up through the floor inside. You should listen to the advice about applying a generous dose of glyphosate. |
Knotweed
In article ,
lid says... "Spider" wrote in message ... "Charlie Pridham" wrote in message T... In article , lid says... "Stuart Noble" wrote in message m... I've read everything I can find online about Japanese Knotweed but I wonder how effective plastic sheeting might be in smothering it. The front garden in question won't have anything done to it for a year, so it would be a convenient time to cover it and treat any shoots appearing at the edges. There is thick concrete either side, so with luck it won't find its way past that. However, I don't want to create a damp hothouse environment that might make matters worse over the summer. Any advice appreciated Hi Stuart, When we moved to this house and garden nearly 30 years ago, there were two or three stands of Japenese Knotweed. At that time, I didn't know what it was, just that it was a menace. We called it Doomweed then, and still do! I spent a couple of years doing nothing in the garden but digging it out .. waiting for it to reappear .. digging it out ... Eventually, I got to the point where it was considerably weakened, but some furled red shoots still appeared. Whilst in this weakened state, we liberally blasted it with glyphosate, firstly as directed, then neat. We got rid of it! :~). There is no really effective way of eradicating it, except blood, sweat and tears followed by Glyphosate. If it's in your neighbour's garden too and they're not willing to shift it, then I'm afraid you're doomed. Moving house is probably easier :~(. Alas, I have noticed a huge stand of Jap. Knotweed in my rear neighbour's garden. I'm watching it very, very carefully. *Gulp* :~( Indeed and down here when I was growing up it was known as Donkey Rhubarb and we all ate it as children, My wife still maintains the only reason it has become a problem as children don't eat it any more!! -- Charlie Pridham, Gardening in Cornwall www.roselandhouse.co.uk Holders of national collections of Clematis viticella cultivars and Lapageria rosea |
Knotweed
I've seen articles saying the young 8 inch shoots are edible and delicious, like Rhubarb but better,................... Personally I would use the Glyphosate If it's like Rhubarb then I'd use custard on it. David Hill |
Knotweed
Dave Hill wrote:
Sorry we bothered, next time we'll keep quiet. I don't object to being reminded about something I might have missed (although that would be difficult when googling knotweed), but I don't expect to be reprimanded for daring to suggest a supplementary approach. |
Knotweed
" I've seen articles saying the young 8 inch shoots are edible and delicious, like Rhubarb but better, -- Regards Bob Hobden W.of London. UK During the war, we as kids, would play in the jungle of Knotweed and often chew the stems - as you say like rhubarb but quite sharp. They would be thirst quenching. as kids we'd try anything. I can't say how the stems would be used in the kitchen though. Bill |
Knotweed
Charlie Pridham wrote:
Indeed and down here when I was growing up it was known as Donkey Rhubarb and we all ate it as children, My wife still maintains the only reason it has become a problem as children don't eat it any more!! I don't know if anyone's mentioned this as I've passed-over a lot of posts due to lack of snipping - but, heard on Auntie BBC there is, there is about to be or there has been a trial with a (Japanese) insect which noshes knotweed to death. -- Rusty |
| All times are GMT +1. The time now is 07:33 AM. |
|
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
GardenBanter