Can japanese knotweed be contained??
simcoe_ponder
20 years ago
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mary_rockland
20 years agoRelated Discussions
juniper and japanese knotweed mess
Comments (1)Getting rid of Japanese knotweed [aka Japanese Bamboo] is do-able; doing so requires persistence. I got rid of a patch somewhat bigger than yours by digging out the plants as best I could and then by assiduously cutting back new growth as soon as it appeared. [This starves the plant for light and interrupts photosynthesis.] After the initial digging out of individual plants, the maintenanceÂclipping new growthÂwas pretty easy. Even mowing works; it just takes near-daily diligence. The patch never recovered and within two years was 100% knotweed-free, and has remained so for the past 15 years. Herbicides work, too, but they will kill the juniper as well and will not completely kill the knotweed's underground root system, so you're still left with clipping. If you do choose the chemical route, spray the knotweed when it is in flower (late summer). But try the non-chemical method; it repays efforts with a lot of personal gratification....See MoreJapanese Knotweed - the non-invasive variety?
Comments (3)I have seen very well behaved varieties and of course there are the incredibly invasive varieties. These pictures look a lot like the variety I had. I planted 4 of these from 3" pots about 3 years ago. I needed to remove them this year for an irrigation system. After 4 weeks of repeated applications of glyphosate, I ended up having to dig them out of the ground. The roots were 2-3 feet deep. It's an incredibly tough plant. More like a very hardy shrub that grows anew each year than a typical perrenial. It was a pretty plant when they were young then they were a huge nuissance. I was constantly pruning to keep them under control. I would not recommend them unless you want them to take over a fairly large portion of your yard. Aaron Here is a link that might be useful:...See Morejapanese knotweed
Comments (1)Dear Dian, Thank you very much for the inquiry. This is a very invasive species and difficult to control due to its growth habit. It is best controlled in the late spring during flowering. Products containing triclopyr are the best bet, and it quinclorac (drive) is added to the mix, you will make even more headway.. Prepare for multiple applications and follow all directions, please. Again thanks for the inquiry. Respectfully, Trey Rogers The Yard Doctor...See MoreJapanese knotweed for dinner
Comments (1)If you can't beat it, eat it....See MoreBelgianRose
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