Landscape Watering Calculator
 -  Public Utilities

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.

IMPORTANT: The Landscape Watering Calculator does not reflect local mandatory conservation measures that may be in effect because of the current water supply shortage. Please read the Mandatory Water Use Restrictions page (or check with your own water supplier if you live outside of the City) to learn your restrictions. For example, current outdoor watering restrictions in the City of San Diego are as follows:

1. Irrigate no more than three (3) assigned days per week. The assigned days are:
  • Residences with odd-numbered addresses Water ONLY on Sunday, Tuesdays & Thursdays
  • Residences with even-numbered addressed water ONLY on Mondays, Wednesdays & Saturdays
  • Apartments, Condos & Businesses water ONLY on Mondays, Wednesdays & Fridays
2. Water at the right times:
  • November 1 - May 31: Water between 4 pm and 10 am; for only 7 minutes per station when using a standard sprinkler system.
  • June 1 - October 31: Between 6 pm and 10 am; for only 10 minutes per watering station when using a standard sprinkler system.
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.