Help!! Japanese Knotweed - Any tips?

Soundood

Soundood

Soundood

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ok guys, i am landscaping the garden, and found this stuff everywhere last year (end of summer) i pulled up as much as i could and burnt it,

since then i have now leveled what was a sloping garden, but in the process i have taken soil from the high points (knotweed area) and set it down in the lower area of the garden to make level.

all was good till a week ago, and the red shoots started appearing around the garden, i am about to start an attack using Roundup (glyphosate), to try and reduce this spread.

this will be done three times now, mid summer and end of summer.

in the meantime, i am going to patio half of this area, and lawn the other half, what are the implications on this? if any?

has anyone had to take this on before? how did you get rid of it/control it?

and what kind of results did you get?

thanks in adnace guys and gals
 
Roundup will do it, our place was utterly infested when we moved in, tried digging it out, cutting it down, hydroxide on the roots, the works. Nothing touched it.

Two does of Roundup and it never came back. Be prepared for a sore hand from using the poxy hand trigger unit the spray can has though!
 
If you dig it out or cut it down then it can re-root where you leave/dump it. Incinerate any loose plant that you have.
Soil containing Japanese knotweed material and burnt remains of Japanese knotweed may be buried on the site where it was produced. The material should be covered with a root barrier membrane and then buried at least 5 metres deep with inert fill or topsoil.
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Nasty stuff!
 
SB118 said:
Roundup will do it, our place was utterly infested when we moved in, tried digging it out, cutting it down, hydroxide on the roots, the works. Nothing touched it.

Two does of Roundup and it never came back. Be prepared for a sore hand from using the poxy hand trigger unit the spray can has though!
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now this is encouraging, and i avoid those hand pumps at all costs, roundup now does a pump spray ;)

thanks for the replys so far guys
 
mrbell1984 said:
Is this knotweed some invincible plant or something like that? Seems near impossible to get rid of!
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It is extremely difficult to eradicate.

Even a tiny fragment of the plant is capable of regeneration.

When you cut it down put it on a plastic sheet to dry out, then burn the stuff,saving you sheet first, if you leave to dry on the ground it will grow back.

SB118 get yourself a Knapsack sprayer, best thing I bought myself.

When I had it, I was lucky, that I could obtain horticultural round up, a lot stonger that what you buy in the shops.
 
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Dig it up, eat it or sell it on a market stall!

HERE

Free food when the seasons permit as youll be hard pushed to get rid of it.

Failing that you could (if you have any) use creosote and just lace the ground with it if you dont plan on planting anything (ie the paving your putting down).
 
mrbell1984 said:
Is this knotweed some invincible plant or something like that? Seems near impossible to get rid of!
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oh it is a *****, the root system can extend more than 3m downwards and it can take colder weather than the UK ever sees. It has been known to regrow from burnt waste (although I suspect this might actually be because where the burnt waste was buried was already affected). Remember that if you do cut it down then it is classed as controlled waste.
 
You need to keep it clear of the ground when drying, hence the plastic sheet.
Even a miniscule piece will grow, & I mean miniscule,:(

FACTS: Its rhizomes can survive temperatures of −35 °C :eek:, plus Rhizome segments can remain dormant in soil for twenty years before producing new plants.:eek:

It's a weed from hell.:(

Bushmins spray it.
 
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SB118 said:
Two does of Roundup and it never came back. Be prepared for a sore hand from using the poxy hand trigger unit the spray can has though!
Click to expand...

I find those sprayers far too expensive to run and haven't really worked for me very well. I use double strength on the Roundup you just add to a watering can. It takes a bit longer to apply but found it keeps weeds under control and two applications a year and I get nothing.
 
HAz said:
I wonder what idiot introduced it to our country?
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Some prat thought the flower looked nice so put it in a few gardens. It was also used quite a lot to strengthen road embankments due to the root system holding up the soil.

It is so fierce because where it evolved is basically volcanic with little nutrients.
 
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