By The Old House Web
Cool season grasses require one (1) inch of water per week to remain actively growing when temperatures are between 45? and 85? F. If temperatures are between 85? and 90?, turf may require an inch and one half (1 1/2). Temperatures 90? and higher signal two (2) inches of moisture to keep grass actively growing.

Less water amounts may force turf into a dormant state.

During extended droughts, turf requires a half inch (1/2) every week to keep crowns alive. Amounts of one-third to one-half (1/3 - 1/2) inch every three week keeps the root system alive.

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