Can anyone tell me why the ends of some branches are drying up on this Thuja? I live near Tucson, Az. zone 9a, and the temperature is between 95 and 105F in the afternoons, but I water it using a soaker hose for 2 hours every second or third day at night when my finger, moisture meter and wooden dowel agree it's almost dry. It hasn't rained here since I planted the tree on May 8. I really don't want to lose this tree. It was shipped from Oklahoma. It has never been fertilized. Any suggestions would be greatly appreciated. Here are some pix showing where on the tree the branch came from and closeup. Could it be too much/little water or too intense sun 10 hours a day? The red tips make me wonder about too much sun. Please help! The small branch was completely dried out near the bottom of the tree. There is mulch around the tree if the prairie dogs don't dig it up to keep cool after watering! Any suggestions would be greatly appreciated.