The right mowing height for every grass type
If there's one dial that controls lawn health more than any other, it's cut height. Get it right and the lawn shades out weeds, holds moisture, and roots deep. Get it wrong and you're fighting brown patches all summer.
The quick chart
| Grass | Ideal height | Where you'll find it |
|---|---|---|
| Kentucky bluegrass | 2.5–3.5 in | Most Chicagoland lawns |
| Tall fescue | 3–4 in | IL shade blends |
| St. Augustine | 3.5–4 in | Houston, San Antonio, shaded TX yards |
| Bermuda | 1.5–2 in | Full-sun Texas lawns |
Why taller usually wins
Blade length and root depth mirror each other — cut short and roots stay shallow, right where heat and drought live. Taller grass also shades soil, which suppresses weed germination (crabgrass especially; see our crabgrass guide) and slows evaporation.
The seasonal adjustment
Raise the deck a notch in summer heat, drop slightly for the final fall cut in cool-season country (our fall checklist covers why). And never break the one-third rule — removing more than a third of the blade in one cut stresses any grass, any season.
Homigo crews set deck height by grass type and season on every recurring visit — it's the kind of detail that separates a lawn that survives August from one that thrives in it.