Grass Mowing Heights
Lawn & Garden · 9 specs
Direct Answer
Turfgrass cutting heights vary between cool-season grasses (Kentucky Bluegrass 2.5–3.5", Tall Fescue 3–4") and warm-season grasses (Bermudagrass 1–2", Zoysia 1–2"), governed by the One-Third Rule never removing more than 1/3 of the blade in a single mowing.
Source: Golf Course Superintendents Association (GCSAA) / University Turf Extensions · Last reviewed Aug 28, 2026
Specs
| Governing Standards | GCSAA Guidelines / University Turf Extension Research |
| The One-Third Rule | Never remove more than 1/3 of total grass blade height in one mowing |
| Kentucky Bluegrass | 2.5 to 3.5 inches (6.4–8.9 cm) | Cool-season standard |
| Tall Fescue | 3.0 to 4.0 inches (7.6–10.2 cm) | Drought-tolerant cool-season |
| Perennial Ryegrass | 2.0 to 3.0 inches (5.1–7.6 cm) | Cool-season overseed |
| Fine Fescue | 2.0 to 3.0 inches (5.1–7.6 cm) | Shade-tolerant cool-season |
| Bermudagrass | 1.0 to 2.0 inches (2.5–5.1 cm) | Warm-season sun lover (Reel or rotary) |
| Zoysiagrass | 1.0 to 2.0 inches (2.5–5.1 cm) | Dense warm-season carpet |
| St. Augustinegrass | 3.0 to 4.0 inches (7.6–10.2 cm) | Coarse warm-season lawn |
Turfgrass Sizing & Mowing Height Matrix
| Grass Species | Grass Type (Climate) | Ideal Spring/Fall Height | Summer Drought Height | Mower Blade Type |
|---|---|---|---|---|
| Kentucky Bluegrass | Cool-Season | 2.5"–3.0" (6.4–7.6 cm) | 3.5" (8.9 cm) | Sharp rotary blade |
| Tall Fescue | Cool-Season | 3.0"–3.5" (7.6–8.9 cm) | 4.0" (10.2 cm) | Standard rotary blade |
| Fine Fescue | Cool-Season (Shade) | 2.0"–2.5" (5.1–6.4 cm) | 3.0" (7.6 cm) | Sharp rotary blade |
| Perennial Ryegrass | Cool-Season | 2.0"–2.5" (5.1–6.4 cm) | 3.0" (7.6 cm) | Rotary or reel blade |
| Bermudagrass | Warm-Season | 1.0"–1.5" (2.5–3.8 cm) | 2.0" (5.1 cm) | Rotary or precision reel mower |
| Zoysiagrass | Warm-Season | 1.0"–1.5" (2.5–3.8 cm) | 2.0" (5.1 cm) | Reel or sharp rotary blade |
| St. Augustine | Warm-Season | 3.0"–3.5" (7.6–8.9 cm) | 4.0" (10.2 cm) | Heavy-duty rotary blade |