Can you provide me with any advice with regards to the use of a total weedkiller such as glyphosate around plants I wish to keep?
Weedkiller such as glyphosate will only kill a plant if the spray lands onto the greenery of that plant as this is the only way it can be absorbed. The weedkiller cannot be taken up through the roots of the plant. If glyphosate, or any total weedkiller, is being used between wanted plants then care should be taken not to get the spray onto those plants. A good tip is to hold a large piece of cardboard in front of those wanted plants, so they are protected from any potential spray drift.