Determining when and how to fertilize the lawn varies depending on the grass variety. Cool-season grasses, such as Kentucky bluegrass, rye grass and fescue, should be fertilized in early fall in temperate climates. Warm-season grasses for mild climates are fertilized throughout the summer.
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A nitrogen fertilizer is applied to warm-season grasses, such as Bermuda grass at a rate of 0.5 to 1.0 lbs. per 1000 square feet of grass.
Fertilizer is applied every four to six weeks from May through August, although slow-release fertilizers are applied less frequently.
In addition to regular fertilizing, proper watering and mowing practices increase the health of the lawn. The lawn mower blades should be sharpened regularly and the lawn should be mowed to the correct height for the grass variety. For example, Bermuda grass is mowed every five to seven days and kept at a height of 0.5 to 2.5 inches. The grass clippings can be left on the lawn, according to the University of Arkansas, unless it clumps, in which case it should be bagged.