How High Should You Mow? A Season-by-Season Guide

Mowing height is the easiest lever you have for a healthier lawn — and it’s free. Taller grass grows deeper roots, shades out weed seeds, and holds moisture through the heat.

The One-Third Rule

Never remove more than one-third of the grass blade in a single cut. Scalping stresses the plant and opens the door to weeds and disease.

Recommended Heights for Ohio Lawns

• Spring (April–May): 3” — the lawn is growing fast, so mow often.
• Summer (June–August): 3.5”–4” — taller grass shades the soil and survives drought.
• Fall (September–October): 3”–3.5” — steady growth and root building.
• Final cut (November): 2.5” — reduces snow mold risk over winter.

Keep Blades Sharp

Dull blades tear grass instead of cutting it, leaving brown, frayed tips. We keep our blades sharp all season.

Bag or Mulch? It Depends on the Season

In summer, mulching is the way to go: a mulching kit chops clippings fine so they drop into the turf, break down in a day or two, and return nitrogen to the soil. In spring and fall, bagging is better — it clears out leaves and debris that can mat down and smother the lawn.

Change Your Direction

Rotate your mowing pattern 30 to 90 degrees each time you cut. Mowing the same lines every week lays the grass over and wears ruts into the lawn.

Tired of keeping up with it? Let 4D handle your weekly mowing.