2026 Robot Mower Cutting Height & Grass-Type Index

Why grass type changes the mower shortlist

Warm-season turf can require very different mowing heights from cool-season lawns. A mower that bottoms out around 2 inches may still fit tall fescue or Kentucky bluegrass well, yet it may not reach a low Bermuda target. Conversely, a mower that tops out below 3.5 inches can be restrictive for standard St. Augustinegrass or tall fescue managed toward the high end of Extension guidance.

Partial overlap is not automatically bad

If a mower overlaps a grass recommendation, it can still hit at least one valid height within that published range. The limitation is flexibility. A mower that only reaches the bottom of a 3–4 inch recommendation leaves little room to raise height during heat, drought, establishment, disease pressure, or seasonal stress.

Do not confuse deck setting with finished cut height

Manufacturer settings describe the mower's adjustment range. Actual turf height can vary with terrain, wheel sink, thatch, tire pressure, blade wear, deck leveling and calibration. Uneven lawns also increase scalping risk at low settings.

Data completeness

This page includes only models for which a comparable minimum and maximum cutting height has been captured in the YardVerdicts database. Missing models are not assumed to lack adjustment. We add them when a current first-party specification can be recorded without guessing.

Methodology

Mower specifications come from manufacturer product or support pages. Turfgrass mowing-height ranges come from university Extension sources. YardVerdicts compares the two intervals mathematically. The result does not account for cultivar-specific exceptions, preferred reel mowing, mower weight, cut quality, frequency, climate, lawn smoothness or agronomic conditions. Local Extension guidance should take priority when it differs from the broad profiles used here.