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Mowing Lawns Info

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MOWING LAWNS

Factsheet | HGIC 1205 | Published: Feb 5, 1999 | Source: hgic.clemson.edu

Lawn grasses need to be mowed properly. This chore is often taken for granted unless you realize that mowing directly affects the health and quality of a lawn. When mowing a lawn, important factors to consider include height of cut, frequency of cut and type of mower used. For the best appearance, mow turfgrasses at the best height for growth as determined by the grass species. You can usually mow a grass that spreads horizontally shorter than an upright-growing bunch-type grass. Grasses with narrow blades can generally be mowed closer than grasses with wide blades. Mow turfgrasses under stress — such as heat, drought or shade — at a higher level of cut. Table 1 outlines mowing heights for lawn turfgrasses in South Carolina.

Proper mowing is important in creating a good-quality lawn because it encourages a dense stand of grass plants. A dense turf keeps out weeds through competition for sunlight and nutrients. A weak, thin turf allows weed seeds to germinate and grow.

Frequency of Cut

Mow regularly. A good rule-of-thumb is to remove no more than one-third of the grass height at any one mowing. For example, if you are maintaining your centipede lawn at 2 inches, mow the lawn when it is about 3 inches high. Cutting off more than one-third at one time can stop the roots from growing and would require frequent watering during dry summers to keep the plants alive. Also, following the one-third rule will produce smaller clippings that will disappear quickly by filtering down to the soil surface. If the grass becomes too tall between mowings, raise the mowing height and then gradually reduce it until the recommended height is reached.