Our ponytail is having difficulties. Leaftops falling of branches, brown leaves and dying branches. This tree is about 25 years old and situated on Aruba. So climate is perfect. I water it once a week for 4 years now, but we have had some very dry weather (no rain for 3 months). I googled a lot, but most causes given for what is happening to my tree is that it has had too much water. I can not believe that, but also can not rule it out. Soil seems dry, nu fungal smell. The foot , stem, seems a little discolored, somewhat lighter. Dont know if this is a sign of anything. I am desperate as I want to safe this beautiful tree! Please help!!! Thanks!!! Mike