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peds

Japanese Knotweed

Question

Yeah I know, knot exactly a tree, but you guys are just so bloody clever I know you can help with this.

 

I've just inherited the use of a polytunnel which has lain dormant for a couple of years, and a nearby clump of Japanese Knotweed has started to poke through the ground in places. It's not too bad, but the problem will only get worse, obviously. I'll try and get a couple of photos tomorrow.

I've got plans to move the tunnel in the future, maybe next season, maybe the year after... but for this year, what can I do to minimise the problem? I'm wary of cutting the stems out, but I'd much rather keep the ground that I have available instead of putting in raised beds or benches after putting down sheets or slabs or something, as I hope to move the tunnel in the future. How much of an extra problem am I creating by just cutting the stems now and pretending they don't exist for the rest of the season?

 

Thanks for any advice dudes.

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20 minutes ago, peds said:

Might just not bother and grow my tomatoes somewhere else!

If you're growing there it means you can monitor the weed, glyphosate will deal with all the aerial bits so it will not interfere with your tomato plants.

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I had a patch of knotweed probably  and area of 15Mx10m with 1-2M stems.   I bought an injection tool from the US from JK injection systems.  Then I injected the stems with neat glyphosate in late Summer.  It certainly worked as there were only 10% of stems the next year and I have kept hammering them every Summer for 5 years.  I get the odd stem popping up but nothing like what was there before.

My advice is keep monitoring the patch and keep injecting.  Maybe a large syringe would do the job, or an old sheep worming needle.

Hope you get rid of it.

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2 hours ago, Hoolio206 said:

 

I had a patch of knotweed probably  and area of 15Mx10m with 1-2M stems.   I bought an injection tool from the US from JK injection systems.  Then I injected the stems with neat glyphosate in late Summer.  It certainly worked as there were only 10% of stems the next year and I have kept hammering them every Summer for 5 years.  I get the odd stem popping up but nothing like what was there before.

My advice is keep monitoring the patch and keep injecting.  Maybe a large syringe would do the job, or an old sheep worming needle.

Hope you get rid of it.

Safer (and faster)to use  proper injection tool.

fella I know almost got round up in his eyes when needle broke 

 

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You can eat the fresh tips off the knotweed apparently it tastes like rhubarb. You have to cook and eat them on site though as it is an offence to move it. 

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4 hours ago, peatff said:

You can eat the fresh tips off the knotweed apparently it tastes like rhubarb. You have to cook and eat them on site though as it is an offence to move it. 

Tried it - delicious! Better than rhubarb. The Japs make tea from it as well, supposably has health properties. 

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Oh, but I like a challenge. Maybe I'll try homoeopathic remedies, invocative chanting and yoga instead of the tried-and-tested chemicals. Kinder to the bees. 

 

Fire could be a good idea though, I'll definitely look into that. 

 

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