Vegetables & Sustainable
Most all gardens in California will require some irrigation especially in summer. Irrigation that is inadequate will cause a significant reduction in productivity. However, water can be very expensive so creating an irrigation system that will adjust to the rooting depth of various plants is important.
Deeper root plants such as tomatoes will need water less often but when you do water, water for a longer period of time. Shallower rooted crops will need water more often but for not as long.