Getting rid of borage, nettles etc

Yes, it takes a week or so before you see any significant effect. Different plants respond to it at different rates. Some are dead within days, some take repeat treatment over several weeks.

Also, if it rains within a few hours of spraying, the effect will be drastically reduced as the rain washes off the round-up before the plant has absorbed it. Repeat applications is the trick.

 

Yes I fear some of the weeds are laughing in the face of roundup and will definitely need a repeat application. will spray some again tomorrow when no chance of rain