A lawn which is properly mowed will be more healthy and better able to resist weeds, disease, and insects.
It is very important to keep mower blades sharp. This may mean blade sharpening several times per season. A dull blade tears the leaves, which not only causes discolouration, but also makes the lawn more susceptible to insects and disease. A common mistake is to mow too short. Short lawns are less tolerant to stress and more prone to disease and weeds. A Kentucky Bluegrass lawn should be mowed to a height of no less than 5 to 6 centimetres, (2-3″). During hot weather increase the mowing height to 8 to 9 centimetres, (3-4″). To ensure the right mower height, measure the mower blade height by placing it on a driveway or sidewalk.