Posted: 03/05/2016 at 18:15
Chemicals available to EU gardeners are now severely limited and highly tested. If used according to the instructions there is no danger.
Round-up is designed to be toxic to any plant whose green stems or leaves it touches. It becomes inert in the soil and will not affect your crops.
It has been shown in EU scientific studies to be a problem for some habitats if it gets into water courses. It also seems to be a problem to human health in some poorer, non EU countries where farmers are locked into GM crops which are bred to be resistant to glyphosate and then use it in too high concentrations to kill weeds.
If you are still unsure, you can google for info on soil tests for toxic waste.