📐 Grass Height Guide

Maximize lawn health by mowing at the right height. Use the 1/3 rule to avoid turf stress.

💡 Tip: Sharp mower blades are just as important as the correct height. Dull blades tear the grass, leaving it vulnerable to disease.

Mowing for Health: Why Cutting Height Matters

The height you set your mower blade at is one of the most significant factors in your lawn’s ability to survive heat, drought, and weed invasion. While a "short" lawn looks like a golf course, it requires professional-grade equipment and daily care. For most residential lawns, a slightly taller cut is the secret to a self-sustaining yard.

Height vs. Root Depth

There is a direct correlation between the height of the grass blade and the depth of the root system. Taller grass means more leaf surface for photosynthesis, which provides the energy needed to push roots deeper into the earth. Deeper roots mean your lawn can find water even during a dry spell when surface soil is parched.

Seasonal Height Adjustments

  • Spring: Keep the grass at the lower end of its ideal range to encourage denser growth.
  • Summer: Raise the deck! Keeping grass 0.5 inches taller provides shade to the soil, lowering the temperature and reducing moisture evaporation.
  • Late Fall: Lower the deck slightly for the final cut of the year to prevent "snow mold" fungus.

Mowing Height FAQs

What happens if I cut my grass too short?

This is called "scalping." It stresses the grass, exposing the lower stems and crown to the sun. This often results in yellow or brown patches and allows sunlight to reach weed seeds on the soil surface, causing them to germinate.

Should I change the height for shaded areas?

Yes! Grass in the shade needs more surface area to catch what little light is available. We recommend mowing shaded areas about **0.5 to 1 inch taller** than the sun-drenched parts of your lawn.

Should I mow lower before fertilizing?

Actually, it’s better to mow at your normal height. Mowing lower creates stress, and you don’t want to fertilize a stressed plant. Mow, then wait a day to fertilize and water it in.

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