Watering Lawns in Southern California: Timing, Amount, and Soil Type

A SoCal homeowner asks the best time to water.

General Rules

• ≥1 inch/week from rain + irrigation. Less is better for health and conservation.
• Best times: early morning or early evening (less wind/heat).
• Deep, infrequent watering (1 inch = 4–6 inch depth) is healthiest.
• Water until root zone moist. Adjust for soil: sand=30 min/week; loam/silt=2 hrs; clay=5 hrs slow.
• Stop if puddles/runoff; let soak, then resume.
• Water when probe/screwdriver hard to push, or soil dry at root zone.

Measurement Trick

Place straight-sided cans (tuna, cake pans) under sprinkler. Time to 1 inch = your watering duration.

Resources

• Arizona Watering Turf (warm-season grasses)
• California Lawn Watering Guide