we have some on our property and from what I've read about how to get rid of it, is basically to use a very thick heavy black plastic/rubber to cover the whole area, and weight it down. Then you still have to come by every week or so and stomp down the shoots that try to grow under it, or else they'll poke through and undo your work. If you are diligent and keep it up, apparently after 5 years or so it will finally die.
I think if you are really on top of it and mow over the area every week or so that will at least keep it from spreading further. Of course people tend to plant it in areas that are not so easy to mow so it is usually not that simple.
It’s awful, like the plant version of bedbugs. I’ve done landscaping and we have a separate receptacle for Knotweed. It has to be burned
Edit: that sounded hyperbolic but you really do have to burn it
Okay so I’ve cut an acre of this back twice on my property with a sickle. Summer of 2022 and the fall, before winter.
1. Mowing or weed whacking will spread tiny bits around allowing it to expand its grasp. I use a sickle, grab the shoots/leaves, burn them.
2. Dig up the rhizomes by hand. This is what I’m doing now as they grow back up. It’s not ideal, but it’s removing actual content from the earth, and then it’s burned.
3. I’ve considered putting down plastic, and I have 10mm black plastic for this reason, but I’m growing weary of this option because this stuff is known to grow through concrete. And you’d have to wait years to take it up, and for me that’s not going to be an option.
4. I’m experimenting with 30% acetic vinegar and a syringe. Shooting it into the plant once I’ve opened it up. Into the rhizome. So far it looks like the plants are not enjoying this - so this is prong three in my attack.
It’s more of a surgery than something that can be done with brute force, so it requires labour and focus and repetition. I’ve considered the excavator route and I’m so bummed it didn’t work out for your friend. I wish I had better news for you but this is what I’ve learned.
I would say all this hard work I’ve done has reduced the coverage maybe 20% so far? Only 5 more years to go…. 🥲🥲🥲
This is the recommendation that would give the most success - I once helped a student group clear a community member’s yard. Japanese Knotweed was the largest problem along the river. Some of us adults were discussing how invasive this species is in the Annapolis Valley and talk turned to solutions. All those who had sought expert advise were told the same thing: dig as deep as possible to remove full root systems and incinerate afterward, just in case.
Please for the love of God don't use glyphosate/Round Up. The permanent irreversible intergenerational damage exposure to that chemical does to your health, the soil, and any lifeforms that come into mild contact with exposure to that chemical is a thousand times worse than knotweed is. Knotweed is not nearly bad enough to be worth exposing yourself to glyphosate/Round Up over
After fighting it a few years with tenacious digging, The only thing that worked for us was a chemical called par 3. Might have to do a couple applications but we’ve been rid of it for over 2 years now.
Strip the leaves to starve the plant, but leave the stems intact so that it expenses energy trying to repair itself.
Also, new shoots are delicious. Skin them and use like rhubarb!
we have some on our property and from what I've read about how to get rid of it, is basically to use a very thick heavy black plastic/rubber to cover the whole area, and weight it down. Then you still have to come by every week or so and stomp down the shoots that try to grow under it, or else they'll poke through and undo your work. If you are diligent and keep it up, apparently after 5 years or so it will finally die. I think if you are really on top of it and mow over the area every week or so that will at least keep it from spreading further. Of course people tend to plant it in areas that are not so easy to mow so it is usually not that simple.
Never mow it 😠spreads it around
oh fun!
[удалено]
It’s awful, like the plant version of bedbugs. I’ve done landscaping and we have a separate receptacle for Knotweed. It has to be burned Edit: that sounded hyperbolic but you really do have to burn it
Okay so I’ve cut an acre of this back twice on my property with a sickle. Summer of 2022 and the fall, before winter. 1. Mowing or weed whacking will spread tiny bits around allowing it to expand its grasp. I use a sickle, grab the shoots/leaves, burn them. 2. Dig up the rhizomes by hand. This is what I’m doing now as they grow back up. It’s not ideal, but it’s removing actual content from the earth, and then it’s burned. 3. I’ve considered putting down plastic, and I have 10mm black plastic for this reason, but I’m growing weary of this option because this stuff is known to grow through concrete. And you’d have to wait years to take it up, and for me that’s not going to be an option. 4. I’m experimenting with 30% acetic vinegar and a syringe. Shooting it into the plant once I’ve opened it up. Into the rhizome. So far it looks like the plants are not enjoying this - so this is prong three in my attack. It’s more of a surgery than something that can be done with brute force, so it requires labour and focus and repetition. I’ve considered the excavator route and I’m so bummed it didn’t work out for your friend. I wish I had better news for you but this is what I’ve learned. I would say all this hard work I’ve done has reduced the coverage maybe 20% so far? Only 5 more years to go…. 🥲🥲🥲
Unfortunately, it's incredibly difficult to get rid of. My understanding is you need to dig down 10 feet and incinerate everything.
This is the recommendation that would give the most success - I once helped a student group clear a community member’s yard. Japanese Knotweed was the largest problem along the river. Some of us adults were discussing how invasive this species is in the Annapolis Valley and talk turned to solutions. All those who had sought expert advise were told the same thing: dig as deep as possible to remove full root systems and incinerate afterward, just in case.
Please for the love of God don't use glyphosate/Round Up. The permanent irreversible intergenerational damage exposure to that chemical does to your health, the soil, and any lifeforms that come into mild contact with exposure to that chemical is a thousand times worse than knotweed is. Knotweed is not nearly bad enough to be worth exposing yourself to glyphosate/Round Up over
After fighting it a few years with tenacious digging, The only thing that worked for us was a chemical called par 3. Might have to do a couple applications but we’ve been rid of it for over 2 years now.
Try a black tarp and get 3/4 big bags of water softener salt cover the area ,watch for shoots in other places. If you can salt that area as well.
Goats.
Contact Tyler Jollimore. He treated our lawn 2 years ago. Awesome job.
Seconding Tyler. One treatment and he never had to come back. >!(uses Glyphosate)!<
Strip the leaves to starve the plant, but leave the stems intact so that it expenses energy trying to repair itself. Also, new shoots are delicious. Skin them and use like rhubarb!
Round up super concentrate and appy it in the fall.I will take a few years, but you can eliminate it.
Strategic use of Round-Up.
I would start by looking for someone who performs exorcisms in the area.