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Posted on: July 20, 2021

Outdoors Water Conservation -Irrigation Timing

Irrigation Head Picture1

Outdoors Water Conservation: Irrigation Timing 

Daily water application is unnecessary for healthy established turf. Before watering, verify that the grass needs watering:

Step on the grass.

  • Do not water if the grass springs back.
  • Water if the grass stays flattened.

Efficient lawn watering:

  • Water landscapes and lawns during the early morning when it is still cool.
  • Lawns need about 1 inch of rain or water per week. Deep soaking is better for roots than frequent shallow watering.
  • Water your lawn infrequently, one time or less per week, assuming no rainfall has occurred. 
  • Cut grass 3 to 4 inches.

Residential automatic irrigation leads to over watering by hundreds of gallons through “setting and forgetting.”  

  • Turn off automatic irrigation completely and use them only during extended dry spells.
  •  Soil moisture sensors prompt irrigation only when needed. Most cost between $120 and $160. They rarely require replacement. Minnesota irrigation systems must have technology that interrupts irrigation when there is sufficient moisture, and that the user can adjust.
  • Many Minnesota cities have odd/even watering restrictions during the summer months to reduce consumption. It is best to water deeply and infrequently (usually once or twice a week during dry months) to promote healthy and hardy turf and conserve water.

To adjust the lawn irrigation frequency, see:

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