Japanese Knotweed

Any suggestions for getting rid of this? Has anyone tried super strength glyphosate which claims to kill it off?

 

Good evening Nicky and welcome to the site. The " Experts " say, only spray Knotweed in September/October time, just as it is shutting down for the winter. Personally I think that is tosh, I would say spray now, but you need to spray at least once a month or as soon as new foliage forms. It will still probably take 2 to 3 years to get shot of it though.

 

part of my job is managing some sites of japanese knotweed we normally use roundup pro biactive 450 on knotweed and we spray 4 times a year starting as soon as the shoots appear we have just finished spraying all our sites for the first time this year and will check them again in about 6weeks.

 

That sounds good to me Ixi, unlike the councils down here who only spray once a year, or not at all.

 

I seem to remember that jap knotweed one of the very few species that have some sort of control legislation about them, but I can't remember the details, or even where I read that. It might be worth reading up on though.

 

This is for us here in Scotland:

Scottish Government: Japanese Knotweed Removal

It is rife here in our local town - only having been discovered when Tesco did a survey for their new store - turns out it has spread along the Kilmarnock Water, the River Irvine, and no-one noticed until Tesco came along!!!

 

Hi

I had this in the parking area of a house I lived in. None of the other house owners seemed interested so I had to deal with it. I bought sodium chlorate I think and watered it on which meant everything in the vicinity died too. It still took 2-3 years to finally be wiped out. It depends whether it's in with other plants but because it so persistent there may have to be sacrifices.

It will keep coming back for sometime. Awful stuff. Good luck!

Kate

 

There are some that would eat there way through the problem

BBC - Chef cooks up recipes for Japanese Knotweed

 

And wash it down with this Japanese Knotweed Recipe - Knotweed Wine

 

Got all excited about that site Scrunge, till I realised it was foreign:DOH:

 

Rather like this book I got for pennies at a car boot:

 

There was - and probably still is, given the nature of the plant - a patch of knotweed in a neighbouring garden. While the house was empty, I snuck over the fence and blitzed it into retreat, but I doubt I have killed it forever. We now have new people living there; a delightful Polish couple for whom it is their first home. I wonder at what point you say: 'oh, by the way, there is this plant called knotweed. You may find you have it. It takes at least three to four years to destroy, can make its way through concrete and, er, some mortgage companies are now getting a little sticky about it.'

 

You could start with "Niebezpieczeństwo japończyk *knotweed* "