Originally Posted by

adm wrote:
Dear All,

I have a couple of areas on my property that appear to be infested with
Japanese Knotweed. I keep cutting it down, but it keeps growing right back
up again - and it grows fast so I have to go out and kill off all the new
shoots every two weeks or so.

Chemical and physical attack combined offer the best hope of success.
But it will take one or two seasons of near scorched earth policy to
get rid of it.

Any idea as to how to get rif of it for ever ? I have heard that you don't
want to dig it up as it will rejuvenate even from the tiniest bit of
rhizome.

Although this is true it is not to be so easy for it to regrow from
smaller pieces of rhizome after they have been hit with glyphosate or
SBK. I suspect that you get a better kill by using it at a lower
dilution than is normally recommended so that there is more time for
the systemic effects to permeate the entire root system.

There must be a FAQ somewhere on what people have found most effective.
It grows very fast when it is warm so you must keep on top of it
regularly.

Regards,
Martin Brown