Posted: 23/05/2017 at 17:55
When using Round Up please do not be tempted to put it on as a stronger solution.
Follow the manufacturers instructions to the letter.
We inherited knot weed and with Round up managed to eradicate it completely in just a couple of years.
...but that was years ago.
Maybe now knot weed is resistant ...
We used the Round Up sold to to farmers in large concentrated bottles.
Not tiny spray bottles with it already diluted.
Maybe the chemicals aren't as powerful for amateur gardeners.