Hi, I am new to this forum. About eight months ago I planted a Desert Museum PV in our back yard. It was planted correctly with the root flare exposed. Although it was planted in a grassy area, we cleared the area for about 4 feet around the tree, so it's really sitting in soil. It seemed to be doing fine with deep-watering twice a week (an hour of watering with a teeny trickle from the hose, about 3 feet out from the trunk). Now it is December and some leaves are turning yellow. I have read that this either could be "normal" or it could be due to overwatering. I live in Zone 9, Central California, so we do have a winter which hopefully brings us rain. We have very hot summers. Can anyone tell me definitively if I am overwatering?