Thank you @MitchellMc I'll try Seasol and update in a few days.

I posted pictures of the 2 hedges for reference. One recovered with new growth evident, and the other one looking burnt.

Thanks for getting back @Noelle . I did follow the dilution instructions on the label and sprayed in the evening. I got confused because 1 of the hedg ...

Thank you @EricL I will certainly want to give it time to heal if there is a chance.

Thanks for getting back @mich19. Yes it does look sort of burnt. The leaves were initially all severely eaten and then slowly began to die. The other ...