Answer: The amount of water will depend upon your soil type, the plants themselves, and of course the weather. Without knowing how the soil was prepared prior to planting and what plants you're growing, it's difficult for me to assess the situation. Generally, builders want your landscape to succeed because of warranties. So, I think they probably set your timers to work on a schedule that has been successful in the past. Here's a website with gardening information specifically for California desert climates: http://www.palmdalewater.org/YW/XS/seven_steps.html
Check it out and you'll learn about the soil relationship to plant type and weather. Hope you find it helpful!
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