Less is needed during cooler weather. Water lawns every three to five days, rather than for a short period every day. The amount of water applied can easily be measured by placing a can in the area being sprinkled. Measure the time required to apply the proper amount of water and use this information for future sprinkling. Grass which is green does not need water.
Water is required when the grass starts to develop a black tinge along the top.
Recovery is almost immediate when water is applied at this stage. Do not over water in anticipation of a shortage. Soil cannot store extra water, especially in sandy soils. Do not turn on sprinklers and leave for the day. Water during the cool part of the day, in the morning or evening.