Cutting grass short can lead to various lawn issues like weed growth and pest attraction. A slightly taller grass cut enhances lawn health. The ideal cutting height varies by region, with cool-season grasses in Northern areas needing at least 3.5 inches, while warm-season Southern grasses do well at 1.5 to 2.5 inches. Homeowners should avoid cutting more than one-third of grass blades to maintain energy production and health, as overly short grass limits sunlight for photosynthesis, much like trees in a shaded forest.
Cutting your lawn too short or 'scalping' can stress your turf, encourage weed growth, and even attract pests, making it important to adjust your mowing strategy.
Landscapers agree that a slightly taller cut, the right timing, and well-maintained equipment can transform a patchy lawn into a thriving green space.
For cool-season grasses in Northern regions, like fescue and Kentucky bluegrass, I recommend the higher the better and to never cut below 3.5 inches.
Your grass uses its blades to create energy via photosynthesis. If you cut more than a third of the blade, it is deprived of that surface area.
Cutting the grass short might seem like a homeowner hack, but it creates a barrier from the sun to the soil, hindering photosynthesis.
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