manzanitas split trunk
I live in San Diego, and I have an unknown species of Manzanitas in the parkway. It is well established, over 10 years old, about 4 feet high and wide. Very happy until a week or two ago when the main trunk split all the way through. Now the leaves are all dying. Too much water seems unlikely as we water 20 minutes once per week. And is there anything I can do?