Kentucky Bluegrass
Poa pratensis · Cool-season, Perennial, C3 grass
AI-generated identification · may be incorrect
Grass Category
Lawn/Turf Grass, Sports Turf, Golf Course Grass
Hardiness Zones
USDA Hardiness Zones 3 to 7, exhibits excellent cold tolerance but struggles in extreme southern heat unless irrigated.
Grass Family
Poaceae, subfamily Pooideae
Variety / Cultivar
Common or mixed turf-type cultivars (e.g., 'Midnight', 'Bewitched')
About This Grass
Dense, fine-to-medium textured turf with a rich dark green to blue-green color. It forms a lush, uniform carpet that stays green through spring and fall, going semi-dormant or dormant during severe summer heat and drought.
Blade Characteristics
Medium-fine blades (approx 2-4mm wide) with distinctive boat-shaped tips, folded vernation in the bud, prominent parallel veins, and a smooth texture with a membranous ligule.
Root System
Moderately deep fibrous root system combined with extensive rhizomes, creating a strong, dense sod with moderate establishment speed and a tendency to develop thatch over time.
Growing Information
Origin Region
Europe, northern Asia, and parts of the mountains of North America; widely cultivated in cool-temperate regions worldwide
Growth Habit
Rhizomatous, forming a dense sod and spreading via underground stems
Sunlight & Water Needs
Requires full sun (minimum 6-8 hours daily), high water needs for optimal appearance during dry periods, and prefers well-drained fertile soils with a pH between 6.0 and 7.0.
Mowing & Maintenance
Ideal mowing height ranges from 2.0 to 3.5 inches. Requires regular mowing, moderate to high fertilization (3-4 lbs N per 1000 sq ft per year), occasional dethatching/aeration, and medium-high maintenance.
Special Characteristics
Good wear tolerance and excellent self-repairing capability due to rhizomatous growth, moderate shade tolerance, prone to certain diseases like dollar spot and leaf spot under stress.
Ecological Information
Introduced species in North America, widely used for turf stabilization and erosion control, provides standard urban wildlife cover, and frequently blended with perennial ryegrass and fescues.