The City of San Diego

Public Utilities  -  Landscape Watering Calculator

The City of San Diego Landscape Watering Calculator is an easy-to-use tool that helps you estimate the right amount of water to give your landscape or garden.

The calculator has been designed to give you a weekly schedule for the maximum amount of water which your plants may need each month of the year. Because everyone's landscape is different, the calculator has been simplified by using average numbers for weather, plants, and soils in San Diego.

How to use the Landscape Watering Calculator:
  • Answer the questions below for each area of your yard.
  • Press the "Accept this area and create another" button.
  • Repeat for each area of your yard (up to 6 areas).
  • Press the "I'm finished, please create my custom watering schedule" button.

1. What is your zip code within San Diego County?

2. What would you like to call this landscape area ?
(front yard, citrus trees, etc)

3. What type of plants are you watering?
( Look here for examples of Grasses, Ground Covers, Shrubs, or Trees )

4. On this scale from Sandy to Clay, how would you describe your type of soil?


Sandy Loam


Clay Loam


5. What type of watering system do you have?


Impact Rotor

Gear Rotor

If you are using a Sprinkler, Rotor, or Micro-Spray, and you know your application rate , please enter it here: inches/hour.