I agree with Darby on the timing. Water early in the morning (between 5 and 8) while it is still cool and before the sun evaporates all your water and burns the grass.
However, I disagree on the frequency. The water needs of various grass types varies, but one inch per week is a good rule of thumb. Plant a tuna can in the lawn and test if you are getting an inch of water onto the turf. I think (and your Virginia Cooperative Extension folks agree with me)
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that you can get away with watering twice a week to effectively reach this level.
Sorry Darby, it's just a difference of opinion. Hope we can still be friends. =)
However, I disagree on the frequency. The water needs of various grass types varies, but one inch per week is a good rule of thumb. Plant a tuna can in the lawn and test if you are getting an inch of water onto the turf. I think (and your Virginia Cooperative Extension folks agree with me) ...»
Sorry Darby, it's just a difference of opinion. Hope we can still be friends. =)