Our lovely mature variegated Holly (about 25 ft) is shedding leaves in one section. The leaves are blackening at the tip and are falling off promptly afterwards. It is spreading rapidly. I have been collecting the fallen leaves and tried to cut back the affected branches, but i can’t control it. We are after the wettest December on record so I fear it my be related? Can you please give me advice as I fear losing this amazing and essential tree!
If that was not the case, it looks like a branch has died back. If this has happened and all the damaged parts can be traced back to a single branch or stem, this can be removed and some of the healthy branches tied into postion to fill the gap, which they will do in a couple of years.