Mow your lawn too often, and the lawn looks bare and scalped. ... This rule says that you should never remove more than one-third of the leaf blade during any one lawn mowing. For example, if you are maintaining Kentucky Bluegrass at 3 inches mow the lawn when it grows to slightly more than 4 inches.

Can you cut grass too high?

A good rule of thumb — never cut more than the top third of the grass blade off. Otherwise, it could stress the plant and cause unsightly browning. A good rule of thumb — never cut more than the top third of the grass blade off. Otherwise, it could stress the plant and cause unsightly browning.

Is it good to let your grass grow long?

Less Weeds, More Greens

Letting the grass grow longer in the spring kept the thistles out of sight. ... Letting the grass grow longer also allows it to get to seed once in awhile. The more grass seed on the lawn, the more grass grows. The more grass grows, the less room there is for the weeds.