California natives and irrigation systems

Joined
Nov 13, 2019
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Location
Riverside/Pomona CA
Hardiness Zone
9
Country
United States
Our campus has an irrigation system which connects with CALSENSE, a weather-based control modification system. It automatically adds or subtracts time to a system based on evapo-transpiration (ET) rates. When it gets hotter and drier the system adds more time and when it gets cooler it subtracts.

I know that California natives are adapted to warm dry summers and cool moist winters so it's opposite of what the plants prefer. I've noticed that Ceanothus and manzanitas especially struggle and often die (SURPRISE! :eek: ) from Phytophthora crown rots in our landscape.

Any thoughts or suggestions appreciated.
(I know "just get them off the system" but it's harder than you'd think)
 

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