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How to Manage Pests

The UC Guide to Healthy Lawns

When to water

Irrigate only when your lawn needs water

In general, your lawn needs water when the top two inches of soil have dried out. If footprints remain visible after walking on the lawn or if the grass has changed color or has started to wilt, you have withheld too much water.

Irrigate early in the morning

The best times to water are between 2 and 8 in the morning. At these times, water use is most efficient, water loss from evaporation is minimal, and distribution is usually good because of good water pressure and limited wind. During the afternoon, water is wasted due to high evaporation rates. Do not water during the evening or pre-midnight hours because thatch and blades are susceptible to diseases if they are wet during cool nights.

Check with your county for water restrictions

Several counties restrict watering one day of the week or only allow watering on certain days depending on your address.

Schedule your irrigation

Illustration emphasizing top two inches of soil
Water when the top two inches of soil have dried out.


Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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