Keep Grass Longer: By keeping grass slightly longer (think 2-3 in. long) you can provide shade to the roots, allowing the root system to become deeper and more efficient at storing water. What’s the benefit? Your lawn requires less mowing and less water! You should mow frequently making sure to leave the clippings in place as this is a great source of valuable nutrients to the soil. To keep longer grass attractive, mower blades should be set one notch higher and the blades kept nice and sharp.