Programming Your Sprinkler Timer: A Comprehensive Guide

Sprinkler Timer, Clock or Controller

Sprinkler timer dial showing various programming options

Whether your sprinkler timer is new or has an existing program, follow these steps to ensure proper operation. It's recommended to review and adjust your program at least once a year.

Step 1: Select the Program

Start by identifying the correct program (A, B, C, or a specific name). The current program is typically displayed on the timer. For new timers, begin with the first program (usually A). For pre-installed timers, repeat this process for each active program.

Step 2: Set Start Times

Start times determine when your sprinkler program activates. Each program requires at least one start time to function correctly. Typical start times are between 10 pm and 6 am. Begin with one start time unless you're experienced with multiple start programming. Additional start times are useful for new plantings, gardens, or controlling runoff in challenging soil conditions.

Step 3: Choose Watering Days

Select watering days based on local water department regulations. In areas with low disease risk, watering 6-7 days a week during peak summer can be efficient. This method often results in water savings by applying less water more frequently. Adjust frequency seasonally, typically watering less in spring and fall. Use the Run Time Tool in our app to establish baseline watering days and durations.

Step 4: Adjust Seasonal Percentage

If your timer features seasonal percentage adjustment, set it to 100% before modifying run times. This setting should represent the hottest part of the season. Adjust the percentage as seasons change to automatically modify run times. For example, set 100% for July (peak summer) and reduce to 70% for milder months like May.

Step 5: Set Run Times

Determining precise run times can be challenging due to various factors like soil type, plant type, weather conditions, and daylight hours. While smart irrigation timers are helpful, on-site monitoring remains crucial for optimal results.

Recommended Run Times by Sprinkler Type

These times are typical for every-other-day watering in mid-summer (85-90°F):

  • Spray Heads: 22 Minutes
  • Part Circle Rotors: 40 Minutes
  • Full Circle Rotors: 60 Minutes
  • Bubblers: 8 Minutes
  • Drip Garden: 15 Minutes
  • Rotary Nozzles: 55 Minutes

These times serve as a starting point. Adjust based on your specific landscape needs and local conditions.