Kentucky Bluegrass (as background turf)
Poa pratensis · Cool-season, Perennial, C3
Grass Family
Poaceae, subfamily Pooideae, tribe Poeae
Grass Category
Lawn/Turf Grass
Variety / Cultivar
Common or Commercial variety (e.g., 'Midnight' or 'Baron' typical for North American lawns)
Hardiness Zones
USDA Zones 3-7; excellent cold tolerance; poor performance in tropical or hot-humid Southern climates.
About This Grass
A medium-textured, high-density turf grass with a distinct dark green to blue-green color. It forms a uniform carpet and goes dormant (brown) during extreme heat or drought.
Blade Characteristics
Width: 2-4mm; Shape: Flat or slightly folded; Tip: Distinctive boat-shaped (keeled) tip; Color: Deep blue-green; Vernation: Folded; Ligule: Short, membranous; Auricles: Absent.
Root System
Fibrous and rhizomatous; moderately deep roots for a cool-season grass; high thatch-forming tendency; excellent sod-forming capability and recovery from wear.
Growing Information
Origin Region
Europe, North Asia, and Northern Africa; well-adapted to temperate, cool-humid climates
Growth Habit
Rhizomatous (spreading via underground stems), formings a dense sod
Sunlight & Water Needs
Full Sun (minimum 6 hours) preferred; moderate to high water needs; moderate drought tolerance via dormancy; prefers soil pH 6.0-7.0.
Mowing & Maintenance
Ideal height: 2.5–3.5 inches; Frequency: Weekly; Fertilizer: 2-4 lbs N per 1,000 sq ft/year; high maintenance requirement.
Special Characteristics
Excellent wear tolerance and recovery due to rhizomes; high turf quality; susceptible to leaf spot and dollar spot; moderate shade tolerance compared to fescues.
Ecological Information
Introduced and naturalized in North America; provides soil stabilization via dense rhizome networks; commonly mixed with Perennial Ryegrass and Fine Fescues for diversity.