I wonder if you have time to provide any advice on why my wisteria’s leaves are curling and what I can do about it. I am at a loss. It has been established in its south-facing situation in Maidenhead, Berkshire, for about 20 years and has never had this problem before. I attach a picture of the shrub in its situation and another close up of some typical leaves. All leaves are affected to a greater or lesser extent.
Thanks so much
