Excess water can be harmful to plants. Check your irrigation system to make sure it has no leaks or misaligned heads. Irrigation products have become more efficient. If you are considering a new irrigation system, look for low volume applications, drip systems, and microsprays. Plants With Low Water Demands.
Natives are a natural for conserving water, but many 'naturalized' plants also do well.
Plants from Mediterranean climates have adapted to our long dry summers and are good choices for a water-efficient garden. Practical Turf Area Use. Since turf grasses require more water than low-water groundcover or shrubs, use turf in active or play areas, and try groundcover and shrubs elsewhere. Consider warm season grass which uses less water than cool season grass. Mulch keeps the soil cool, reduces water loss from the soil and slows weed growth.