Summary: fastest growth rates occur in the summer or under high fertility and watering practices. Mow often enough so that no more than one-third of the blade height is removed per mowing. For example, if your St. Augustine grass lawn is mowed at a height of 3 inches it should be mowed when it grows to a height of 4 to 4½ inches. Stress to the grass caused by mowing can
Image Dimensions: 195 x 300
Image originally found here.