Is the following statement true or false: The One-Third Rule says to leave no more than one third of the grass blades uncut when mowing?

• A. True
• B. False
• C. It says leave two-thirds uncut
• D. It refers to leaf blade width

Answer: (B)

The main idea is how much of the grass blade you should remove in a single mowing. The guideline is to remove no more than one-third of the blade, which means you should leave at least two-thirds of the blade intact. The statement says to leave no more than one-third uncut, which would require you to cut off at least two-thirds of the blade—stressful for the turf and not in line with the rule. For example, mowing from 3 inches down to 2 inches removes about one-third of the blade and follows the guideline; mowing down to 1 inch would remove two-thirds, exceeding the recommended amount. So the statement is false, since it reverses the intended proportion.