Hi, I'm Sean with NaturaLawn of America. When it comes to maintaining a healthy lawn, having a sharp mowing blade is very important.
A sharp mowing blade gives you a nice clean cut when you mow your lawn. A dull mower blade rips the ends of your turf grass, giving you a frayed look and causing it to lose moisture. Picture the difference between cutting a piece of paper with a pair of sharp scissors versus ripping it with your hands; not only does a dull blade cause the lawn to look bad, but it also becomes more susceptible to disease, insect damage or drought and huge stress.
Sharp blades help reserve the plants color and won't cause stress. Keep in mind, new blades are dull like this [see video] and need to be sharpened before mowing. A good rule of thumb is to have your blade sharpened at least 4 times during the mowing season.
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