Use mulches Organic mulches are better choices for water conservation than are inorganic forms such as gravel, because rocks and gravel reflect the heat of the sun and cause the microclimate temperatures around plants to rise. To cool themselves, plants will transpire, allowing water to evaporate from tiny pores in their leaves. As temperatures rise due to the reflected heat, the plant transpires more and has to take up more water to keep the cooling process going. This cancels out the water savings of rock mulches. Finally, promote strong healthy turf growth through proper maintenance.
Healthy grass is more water efficient.
Fertilize grass throughout the spring, summer and early fall to promote deep, strong roots. Mow grass weekly during the summer and adjust the mowing height to a slightly higher level to allow for shading. Also, don't bag your lawn clippings, especially in the summer. The clippings will return nitrogen back to the soil, help mulch the soil surface and conserve water. Also look out for disease or insect damage and treat at the first signs.