It seems odd that sharp lawn mower blades can help keep your grass greener, but it’s true. They really do. First, let’s look at what dull blades do and then let’s talk about sharp blades and their benefit.
Dull Mower Blades…
When your mower blades are dull, they don’t cut the grass, they beat it up. More accurately, they tear the blades of grass instead of cutting them. This creates a larger surface area of damage. Any cutting of vegetative matter is an injury, and like all injuries, it looks a bit different at the point of injury.
You won’t notice anything at first, but wait a couple of days until the torn ends of the grass start to yellow in response to the injury. Then, the nice green grass you worked so hard to create starts to look a little jaundice, especially from a distance and at a low angle. It’s because of all the unnecessary damage caused by dull mower blades.
Sharp Mower Blades…
With sharp lawn mower blades, the grass is cut clean, leaving just the slightest surface area injured. So slight that the damage to the surface of the lawn isn’t noticeable at all. As a result, there is little or no damaged grass to turn yellow on the ends. Instead, it maintains its general green appearance, just like it did before you cut it.
So, if you want to promote a nice green look to your lawn, make certain you have sharp blades on your lawn mower. An easy way to maintain sharp blades is to have a spare blade (or set) so you can keep them sharpened for quick replacement any time you believe it’s necessary.