New lawns need time for their roots to become established before they can be mowed for the first time. For seeded lawns, it may take up to 2 months before they are ready to be mowed. Sod may be ready to be mowed within 2 to 3 weeks of planting. Three to six weeks are required for sprigs, stolons, and plugs to become established. For seeded lawns, wait for all of the seeds to germinate before mowing. For sod, sprigs, stolons, and plugs, make sure the roots are firmly planted in the soil before mowing to avoid tearing out new turf.
How to mow your new lawn