These plants are adapted to the climate in your area. Water less often, but more deeply, and focus on the root zones rather than the entire yard. Terrace steep slopes to reduce runoff. Maintaining a lush, green lawn requires a lot of water. Consider planting a groundcover instead.
Sandy soils lose water because they drain quickly, and clay soils lose water to runoff.
Adding organic matter to these soils will help them hold moisture. It costs nothing to start a compost pile, and in a few months you'll have a ready supply of organic matter to work into your soil. Recycle household wastewater from your dishwasher, bathtub and kitchen sink. Set out an old-fashioned rain barrel connected to the downspout on your house for a ready supply of water. For more gardening tips and ideas subscribe to Perennial Gardening News - The Ultimate Gardening Resource.