Kentucky Bluegrass
Poa pratensis · Cool-season, Perennial, C3 grass
AI-generated identification · may be incorrect
Grass Category
Lawn/Turf Grass
Hardiness Zones
Thrives in USDA Hardiness Zones 3 through 7. Excellent cold tolerance, goes dormant in extreme heat and drought.
Grass Family
Poaceae, subfamily Pooideae
Variety / Cultivar
Common or various blended turf cultivars like 'Midnight' or 'Compact'
About This Grass
A dense, fine to medium-textured turfgrass with a rich dark green to blue-green color. Forms a tight sod with upright vertical growth, reaching heights of 18 to 24 inches if left unmowed. Characterized by distinctive boat-shaped leaf tips and characteristic panicle seed heads at maturity.
Blade Characteristics
Blades are fine to medium in width (2-4mm), flat to folded with distinct parallel veins. Tips are distinctly boat-shaped. Vernation is folded in the bud. Ligule is short and membranous, auricles are absent.
Root System
Moderate depth fibrous root system combined with extensive underground rhizomes. Forms a very dense sod, moderate to slow establishment speed from seed, and moderate thatch-forming tendency.
Growing Information
Origin Region
Europe, northern Asia, and parts of the mountains of North America; widely naturalized and cultivated across temperate regions.
Growth Habit
Rhizomatous, spreading underground via robust rhizomes to form a dense, uniform turf sod.
Sunlight & Water Needs
Requires full sun (minimum 6 hours of direct sunlight) for best performance; moderate shade tolerance. High water needs during hot, dry periods to maintain green color, though it enters summer dormancy under severe drought.
Mowing & Maintenance
Ideal mowing height ranges from 2.0 to 3.5 inches. Requires regular mowing, moderate to high fertilization (2-4 lbs N per 1000 sq ft annually), periodic dethatching, and aeration. High overall maintenance level.
Special Characteristics
Exceptional wear and traffic tolerance due to aggressive rhizomatous recovery. Good winter color retention in milder cool-season zones, moderate disease susceptibility (e.g., leaf spot, summer patch).
Ecological Information
Widely introduced and naturalized in North America. Provides good soil stabilization and erosion control due to dense root and rhizome matrix. Used extensively in residential lawns, athletic fields, and golf course fairways.