Thanks emil - you guys are really fantastic with customer service. I appreciate any suggestions you may have.
So, I do not have any zones with one type of plant except for grass zones. The zones with trees also have shrubs, vines, rose bushes, etc. I have 15 zones, 4 are grass zones, but the rest really are mixed. Unfortunately, there are also areas of some zones with rather variable sun exposure, so I just tried to average each zone into a category the best I could.
Zones 1-4 are grass, mostly fescue but with other random grass in there as well. All 4 areas ended up with large dead patches in October that are starting to recover now. The grass areas have about 4-6 inches of loam over "Redding cobbly loam" which is really mostly clay and large pebbles.
Zones 9 and 10 were the areas with the biggest overwatering issues in November, I lost the palm tree in Zone 10 and have a very unhappy palm in zone 9. Again, the soil is a layer of loam over the native "Redding cobbly loam"
Really there are multiple issues contributing to the palm tree loss, rapid temp drop with rain in a palm tree planted only 4 months earlier. The first winter is the most stressful time for a new palm and the palm was a Ravenea glauca that really does not like "wet feet". The year before I lost shrubs in a different zone due to failing to adjust my old manual watering timer quickly enough in November.