That’s why it’s important to be vigilant about your lawn mower blade’s sharpness. We recommend a few honings per season, but more might be needed if you have rocky soil conditions or extra tough turfgrass. When in doubt, inspect the lawn after mowing. If the grass blades have a lot of split ends, instead of being cleanly cropped, you probably have a dull blade; brown-tipped grass blades are another giveaway.