Established infestation or a relatively young one?

Small infestation of Japanese Knotweed, Clapham

When you have discovered that you have Japanese Knotweed in your garden – whether it is new or a well established patch, it is really important that you don’t simply ignore it!

Simple precautions can help prevents spread further in your garden, such as making sure your children don’t use it as a football goal!  Any small amounts of the stem which is accidentally broken off should be put in a black bag to totally dry out and therefore die and not be able to regenerate.  After that it is fine to put it back into the infested area.


good few stems of Japanese Knotweed Chislehurst
good few stems of Japanese Knotweed Eltham

Now you see me… now you don’t!

Last year we worked really hard by stem injecting a lot of Japanese Knotweed in a site in Catford.  The year the rhizome looked dead – as you can see from the photo it was a large crown which has grown happily for many years.

With initial treatment the chemicals we use are starting to have a good effect as you can see from the rhizome cut in half


Japanese Knotweed rhizome
Japanese Knotweed being killed by herbicide
crown of Japanese Knotweed Catford
size of a crown