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 and enters dormancy in extreme heat.
Grass Family
Poaceae, subfamily Pooideae
Variety / Cultivar
Common or various improved cultivars like 'Midnight' or 'Baron'
About This Grass
Forms a dense, high-quality turf with medium-fine texture and vibrant medium to dark green color. Reaches up to 18-24 inches if unmowed, but maintained at 1.5-2.5 inches.
Blade Characteristics
Medium width (2-4 mm), V-shaped to flat, with distinct boat-shaped tips. Vernation is folded in the bud. Ligule is short and membranous, with no auricles.
Root System
Moderate depth fibrous root system with aggressive underground rhizomes. Forms a very tough, dense sod. Moderate establishment speed from seed.
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 extensively via underground stems to form a dense, uniform turf.
Sunlight & Water Needs
Requires full sun (minimum 6 hours daily) for optimal growth, moderate to high water needs, and good drought tolerance through summer dormancy.
Mowing & Maintenance
Ideal mowing height is 2 to 2.5 inches. High maintenance level requiring regular fertilization (3-4 lbs N per 1000 sq ft annually) and periodic dethatching.
Special Characteristics
Excellent wear tolerance and recovery due to rhizomes, good cold tolerance, moderate shade tolerance, forms dense sod that crowds out weeds effectively.
Ecological Information
Widely introduced and naturalized across North America, provides good erosion control and soil stabilization, frequently blended with Perennial Ryegrass and Fescues.