What is the proper way to water a lawn?
Most lawns in Iowa require 1 to 1½ inches of water per week. When watering the lawn, apply this amount in a single application or possibly 2 applications 3 or 4 days apart. Avoid frequent, light applications of water which promote shallow rooting and lush growth. Lush, shallow-rooted turfgrass is less drought tolerant. It is also more susceptible to pest problems. To determine the amount of water applied by a sprinkler, place 2 or 3 rain gauges within the spray pattern.
Early morning (5:00 to 9:00 am) is the best time to water a lawn. A morning application allows the water to soak deeply into the soil with little water lost to evaporation. When watering is completed, the turfgrass foliage dries quickly. Watering at mid-day is less efficient because of rapid evaporation and strong winds may cause uneven water distribution. Strong, mid-day winds may also carry water onto driveways, sidewalks, or streets, wasting considerable amounts of water. Watering lawns in late afternoon or evening may increase disease problems.