Posted: 04/05/2012 at 18:20
Re killing Japanese Knotweed. I found that by cutting the stem and pouring in a strong solution of Glyphosphate ( I buy it in France where it is more concentrated ) the majority of the plant does not reappear the following season. You will get a few small shoots appearing but these are quickly eradicated with a quick dose. Also, by pouring it into the stem, there is no risk of the solution being blown onto other plants by the wind.