Hi, hope you don’t mind me adding to this thread. I’m no gardener but I love our laurel hedge which is planted at the front of our house on a main road. It’s been there longer than us so I reckon it’s almost 20 years old. We have never watered nor fed it and it’s usually fine with a trim every year or so - very healthy and a good screen between us and the road.
However last year it developed what I think is powdery mildew. I looked online and advice suggested it would recover by itself. My partner pruned it back later last year (autumn I think?) - just the top and the road-facing side (south facing).
Now the un-pruned bits of hedge look healthy but the pruned bits look awful and although there are new shoots growth is definitely stunted.
Do you think I should:
Prune it? All of it or just diseased bits?
Feed it? With what?
Thanks in advance for any advice.