The ideal time for lawn and plant watering is between 4 and 6 a.m. while water demand is low. During this period, water makes deep penetration to the roots. As the temperature rises after 10 a.m., your lawn and plants lose moisture from water evaporation. Although heat and evaporation are lowest at night, keep in mind that many lawn diseases flourish in cool, moist conditions. By using a larger diameter hose, water is dispensed faster.
Efficient sprinklers throw large drops of water in a spray closest to the ground.
Fine, high sprays are affected by the wind and evaporation. Soils are different and should be watered differently. Sandy soils should be watered frequently for shorter time periods.