I have a red Acer tree about two to three feet tall, two Hydrangeas and a Buddleia all of which appear to be dying, leaves shrivelling up. We have just returned from a week away and are horrified to see what has happened. It looks like Ash dieback but I realise it can't be that. One Hydrangea is in a large pot, and everything else is planted in the garden.
Any suggestions on how we can solve this?