Lawn Mowing Tips for Nice Lawns & Personal Safety Done wrong, lawn mowing can damage your lawn, making it more susceptible to diseases. And lawn mowing also poses quite a few safety risks that you definitely want to avoid. This article and video gives lawn mowing tips that will help you to: 1) protect the health of your lawn; and 2) protect the personal safety of you and your children. Lawn Health For the health of your lawn, when you mow you will only want to cut down about one-third of the total height of your grass at any one time. The reason is that if you cut more off than this, it puts too much strain on the grass, since it is the green part of the grass plant that provides the energy for it to grow. You should also sharpen your mower blades after every 10 hours of mowing. Mowing dulls the blade, and when the blade is dull, rather than cut the grass, it instead tears it. And tearing the grass damages it, and makes it more susceptible to