The Q&A Archives: Lawn Watering

Question: Is there a rule of thumb regarding how often to water the lawn? Some say several times a week and others say once a week, running sprinkler long enough to ensure about one inch of moisture. If the once a week is correct, how long does one run sprinkler system to ensure that one inch of moisture?

Answer: Pat,

Lawns do best with deep infrequent watering. This encourages a deep root system that is better able to handle stresses of heat and pests. Water every 5-7 days in the heat of summer. This may need to be adjusted a little based on soil type (sand more often than clay) and sun exposure (sun more often than shade).

Each system puts our water at a different rate so we can't say water for "X" minutes. The better approach is to use coffee cans or other straight-sided containers to determine how long to run your system to collect 1/2 inch (sandy soil) to 1 inch (loam or clay soil) of water. Then you will know how long to run your system.

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