The most common cause of poor lawns is improper watering. Too little can cause weeds to grow which love dry soil and too much watering can cause disease, damaging your lawn.
To keep a healthy lawn you should water it about an inch of water per week during the growing season. There are a few ways to monitor this, you can use a rain gauge or you can also use an empty container to measure how long it would take your sprinklers to provide the necessary amount of water. If after 10 minutes, you have one half inch of water, it will take 20 minutes of sprinkler time to properly water your lawn. Once you know how long it will take your sprinklers to water your lawn properly the use of an automatic shutoff switch or timer will help manage your irrigation system.