Posted: 09/05/2017 at 16:15
I noted that what you said had been 'phrased carefully'.
I agree with Pottering ...... you can't go wrong with a good watering ......... I'd suggest a half-strength feed only ... working on the theory that you don't give a poorly person a rich dinner.
Fingers very crossed that the hedge recovers and that the neighbour can be dissuaded from repeating his action. But if the weedkiller was a systemic type I don't hold out much hope.
Let us know how it goes.