Grasses are like most plants — if you clip off the growing points (for grass, it's in the crown, where the new leaves develop), the plants branch out and become denser, which in this case, turns thousands of individual grass plants into a tightly woven turf or a lawn. If you didn't mow at all, your yard would look more like a prairie than a lawn.
Most grasses have a range of recommended mowing heights. Stay at the upper end of that range when the lawn is under stressful conditions, such as hot weather or drought, or if you have a shady lawn. In cooler weather, you can cut the grass a little lower.
Every year, hundreds, maybe even thousands, of people get injured when using lawn mowers. Power lawn mowers can be dangerous even when used properly. Be proactive when it comes to safety and follow these tips to avoid injuries:
To protect the tree, leave a ring of grass less soil at least 3 feet wide around the trunk. Put in a nice brick or stone edging around the outside. Better yet, cover the open soil with a thick layer (3 to 6 inches deep) of organic mulch, such as compost or bark. (Keep the mulch a few inches away from the base of the tree.)
You can also go to a garden center to buy trunk protectors, plastic sleeves that encircle the trunk, if you have to have the grass right up against the tree.
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