how tall to mow st. augustine grass
You also make it more prone to diseases that can turn the grass brown and burn it out. The University of Florida guidelines for cutting St. Augustine grass state that grass should be kept at a finish length of 3-4 inches. Additionally, no more than 1/3 of the blade should be cut at any one time. So if you are looking for a finish height of 4 inches (a nice, thick lawn) you shouldnât cut that grass until it is 6 inches high, and then you should not cut off more than 2 inches of blade. Those blade clippings will then provide nutrients that help the grass thrive.