Is the following statement true or false: The One-Third Rule dictates leaving no more than one-third uncut blade?

Is the following statement true or false: The One-Third Rule dictates leaving no more than one-third uncut blade?

• A. True
• B. False
• C. It depends on grass species
• D. It depends on mowing height

Answer: (B)

The One-Third Rule is about how much leaf tissue you remove in a single mowing. It says you should cut off no more than one-third of the blade, leaving at least two-thirds uncut. So the statement that you should leave no more than one-third uncut is the opposite of the rule. If you let only one-third stay uncut, you’re removing two-thirds of the leaf in one pass, which can stress the plant, slow recovery, and invite problems like weed invasion.

To visualize it, think of a blade that's 6 inches tall: you should cut off at most 2 inches, finishing around 4 inches. If the blade is 3 inches, cut off at most 1 inch, finishing around 2 inches. This guideline helps maintain turf vigor and resilience after mowing. The idea isn’t about species or mowing height tweaks in practice; it’s a general standard to avoid excessive removal in a single mowing.