WeedsGardening

Getting Rid of Japanese Knotweed

I have a lot, too much Japanese knotwood growing on a huge bank that I need to get rid of forever, cheaply. Does someone have any ideas how I can do this successfully?

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By boxtter@horizonview.net from Bainbridge, OH

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February 7, 20100 found this helpful

Roundup will do the job, good luck.

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May 18, 20110 found this helpful

How do I kill knotweed without killing the grass?

By Paul W from Manchester

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February 7, 20100 found this helpful

Getting Rid of Japanese Knotweed
Does anyone know how to get rid of Japanese Knotweed, just short of using napalm? Salt doesn't bother it at all, and digging it out is impossible without renting a bobcat, even then the smallest piece of root will regrow. Right now, I've resorted to throwing heavy plastic tarps over it and snipping off all the new shoots, but it's a lot faster than me.
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Hardiness Zone: 5a

Beth from Western MA

Answers:

Getting Rid of Japanese Knotweed

I have had luck removing unwanted plants without poisons, by covering the area with old carpet or heavy fabric and covering that with mulch and rocks to look nice. It is called "solarizing" and it also kills any pathogens, germs, etc. I keep it on a full season.
It is healthier to wildlife, pets, and kids than sprays. (04/27/2007)

By Jan Yofee

Getting Rid of Japanese Knotweed

Have you tried spraying it with Roundup? That's supposed to kill anything. (04/28/2007)

By Pat Giles

Getting Rid of Japanese Knotweed

I'd check with a local horticulturalist. Your extension agent might have info. You have to be impressed with a plant that resilient, especially that far north. Maybe there's some research being done on it. (04/28/2007)

By Janice C.

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