Escallonia in serious trouble

QuestionsEscallonia in serious trouble
Sharon Carr Staff asked 15 years ago

I have a fantastic escallonia hedge around my garden for the last eight years. This year however it has deteriorated. You can practically see through it in patches, where it should be solid green throughout the year. Please can you give me any idea what to treat it with as it seems to be spreading. I attach a photo. I really look forward to your reply.