Cool-Season Grasses: Varieties, Identification & Planting Guide

Cool-season grasses grow in spring/fall, brown in summer heat and winter cold. Turf types: Perennial/annual ryegrass, Tall/creeping fescue, Kentucky bluegrass, Bentgrass. Ornamentals: Northern sea oats, Fescues, Tufted hairgrass, Moor grass.

Key Identifiers

• Mostly bunch-type (except Kentucky bluegrass — rhizomes).
• Root growth at 50°F; slows above 90°F or below 32°F.
• Broad mid-vein common; some rolled blades/multiple veins.
• Brown in heat (except tall fescue — better heat tolerance).

Warm vs. Cool: Core Differences

• Cool = northern/temperate; Warm = southern.
• Cool peaks in spring; Warm peaks in summer.
• Warm establishes deep roots slowly (2 years) with little top growth.

Planting Time

• Cool-season: spring or fall (soil ≥40–45°F); needs vernalization (winter cold).
• Warm-season planted in fall won't germinate until spring.