Often herbicides kill only the tops, and repeat treatments are needed following label instructions. I am a new resident and plan to hire a lawn service. Florida lawns are usually cut as needed. We normally remove an inch or two of the top at each cutting. Grass growth slows during the cooler months.
Gardeners can often wait two weeks or more between mowings during late fall and winter.
But spring through early fall, most are mowing once or twice a week. Never remove more than one-third of the leaf blade at any one time. Maintain a sharp blade, and mow in different patterns to prevent forming ruts in the turf. Let clippings lie so they'll return nutrients to the soil. We have a king sago that has developed a white mold on the undersides of the leaves.