How much time per zone?

Bought a new house that already has a sprinkler system. It has 10 zones, many are overlapping. Each zone is programmed to water for 20 minutes. Seems high. Live in Dallas, TX. We are nearing the end of the 100 deg temps (now 85 to 90s). I purchased a Rachio 2 and will be installing it this weekend. What should I start with for each zone? Any suggestions? Most of the yard is St. Augustine. Some trees with shade, but mostly full sun. It’s been rainy this past week.

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What type of irrigation heads are you using? Spray, rotors, drip, rotating nozzles??

Each type of spray has its own rating for time over amount of precipitation delivered.

Provided that the heads are the same on en entire zone, program those variables into the Rachio and it will pick the time for you.

Since you are doing a new install and Rachio has not had the time to build up its water table/ moisture level, it will tend to send you a higher initial value for time until it is satisfied with the amount of water dispersed.

Start with a basic program on a fixed schedule and keep it there for a couple of weeks. Then you can change over to a flex daily or flex monthly schedule that will change values around in favor of a healthy landscape.


Most are popups, 2 zones (2 and 3) use rotors. Thanks for the help.

Your rotors will use up the most time in this scenario. Typically 20 to 30 minutes if the nozzeling is done correctly to match the precipitation.

Spray nozzles should be set for 7 to 15 minutes depending if they are shrub or turf, shade or sun.