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How high should you mow Kentucky bluegrass?
The right mowing height for Minnesota lawns through the season, and why cutting short costs you in July.
· 1 min read · By the Green Leaf crew
Kentucky bluegrass is the backbone of most Minnesota lawns, and the most common mistake we see is cutting it too short.
The short answer
Mow at 3 to 3.5 inches for most of the season, and never remove more than one third of the blade in a single cut.
Why taller is better
- Deeper roots. Root depth tracks blade height. Taller grass reaches water that short grass cannot.
- Fewer weeds. A taller canopy shades the soil, and crabgrass seeds need sunlight to germinate.
- Less watering. Shaded soil stays cooler and holds moisture longer in July.
Adjusting through the year
| Season | Height | Why |
|---|---|---|
| Spring | 3 inches | Encourages the lawn to thicken as it wakes up |
| Summer | 3.5 inches | Shades the soil and reduces heat stress |
| Fall | 3 inches | Keeps the lawn dense while it stores energy |
| Last cut | 2.5 inches | Discourages snow mold and voles over winter |
Keep the blade sharp
A dull blade tears grass instead of cutting it. Torn tips turn brown and open the door to disease. Our crews sharpen blades daily during peak season.
Change directions
Mowing the same pattern every week lays the grass over in one direction and compacts wheel tracks. Rotate direction each visit. It is also what makes those stripes possible.
Want someone else to handle it? Our weekly mowing service keeps the height right all season.
