What is the effect of very low mowing heights on turf?

• A. Increased deeper roots
• B. Improved drought tolerance with no downsides
• C. Increased stress and weed invasion
• D. Reduced mowing frequency

Answer: (C)

Very low mowing heights cut back leaf area to a point where the turf can’t photosynthesize enough to stay strong. With less energy produced, the turf becomes stressed, its density drops, and bare spots appear. Those exposed areas invite weed seeds to germinate and establish, so weed invasion increases. The turf’s roots also tend to be weaker under this stress, making it harder to tolerate heat, drought, and other stresses, not easier. And maintaining very low heights typically requires mowing more often to keep the canopy short, not less, so reduced mowing frequency isn’t the outcome.