The growth rate of your lawn and the desired height of your lawn determine how often you should mow your lawn. Generally, mowing once a week during the growing season should be enough to keep the lawn healthy. The rest of the time, you can reduce the frequency of cutting to alternate weeks, as needed. Having a lawn mowing schedule encourages a healthy and green lawn.
You'll want to mow your lawn more often during your growing season, averaging about once a week, depending on your lawn type. During peak growth, mowing can leave unsightly rows or piles of moist clippings on the surface of the lawn. Mowing the lawn more often will help to avoid this problem. You should mow when the grass has grown 30 to 50 percent above the height at which it was previously mowed.
If your lawn is kept at a height of 2 inches, re-mow when it reaches 3 inches. If the grass has grown to 5 inches in height, you will have to repeat the cut a couple of times, taking only part of the growth in each cut. Removing too much at once will only create more clippings that can shade the remaining grass and weaken it by removing too many active leaves. Short clippings will seep through the remaining leaves and decompose quickly.
Usually, weekly mowing is the rule, but some lawns need to be mowed more often. Other lawns will grow more slowly and may only need to be mowed once every ten days or two weeks. Usually do not cut more than a third of the grass blade. More than that can damage the lawn.
Let the length of the lawn be what you judge, NOT the last time the lawn was mowed. The one-third rule is the best indicator of how often the lawn is mowed. It simply means that you only have to remove a third of the grass blade per cut. So, for example, if you mow the lawn to 2 inches, wait until the grass reaches 3 inches to cut it.
A slightly uneven lawn may not seem like a problem, and over time, any lawn can develop uneven spots. In addition, tests have shown that letting grass grow to lengths of 2½-3″ reduces the amount of weeds in the lawn by reducing the amount of sunlight that reaches weed seeds. Some people like a super short lawn like a putting green, but doing so requires a specific variety of grass and a lot of extra care in fertilizing and other care. Be sure to keep your lawn mowing tools, such as a manual lawn mower or a seated lawn mower, to make sure the blades are sharp.
I found it useful when you said that you should mow the lawn at least once a week to achieve a beautiful lawn.