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!
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