From the Lawn Guide · Section 3.2
Follow the One-Third Rule
Never remove more than one-third of the grass in a single mowing. For example, at a maintained height of around 4 inches, don’t let the lawn grow much beyond 6 inches before mowing. Staying within the one-third rule keeps the lawn healthier, helps it recover faster after mowing, and maintains a consistent dark green appearance.
The full mowing section also covers mowing height, frequency, sharp blades, and mulching. The workbook turns the broader program into a month-by-month checklist.
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