For your first mow, new sod care recommends that you not mow less than three inches in height. After the first mow, it is safe to mow according to the mowing instructions for your grass type, listed above.
Be sure to provide an adequate amount of water to the lawn at all times. While you do not need to water every day, you want to make sure your lawn is receiving at least one to two inches of water a week. If you are using an irrigation system, during the cooler months with little to no rainfall, cycle each zone twice a week using these times as a baseline (adjust as needed): ten minutes for stationary heads, twenty minutes for drip lines and rotary heads. During the warmer months, water at the same frequency and time, but run each zone twice at each watering.
Finally, make sure that you are on a fertilization and weed control regiment. We recommend starting with a light fertilizer to see how the grass responds. Over time, you will find that weeds will not overrun your lawn and the grass will be green.