I have a 30 year old Ponytail Palm that got injured by a large tree branch at the base the hole is about 5 inches deep and 3 inches wide. I am very worried. It seems to be getting deeper. It is in a half wine barrel and about 9 ft high and 40 inches at base. The bark seems to be peeling at the hole going upward. Is there anything I can do for it? or should I just leave it alone? I've have this palm for 30 years.