Kentucky Bluegrass (mixed with Tall Fescue and weeds)
Poa pratensis · Cool-season (C3), Perennial
Grass Family
Poaceae, subfamily Pooideae, tribe Poeae
Grass Category
Lawnv/Turf and Pasture
Variety / Cultivar
Common or unknown lawn mix cultivar
Hardiness Zones
USDA Zones 3-7; excellent cold tolerance; poor performance in high heat/humidity of the deep South.
About This Grass
A dark green, medium-texture grass that forms a tight, manicured appearance when mown but reaches 12-24 inches if left unmown. Often seen in residential lawns and mixed with weeds like the broadleaf plants (Euthamia/Aster) shown in the foreground.
Blade Characteristics
Narrow to medium (2-4mm) width, V-shaped or flat, distinguished by a boat-shaped tip, folded vernation, smooth texture with a light 'railroad track' line down the center. Ligule is short and membranous; auricles are absent.
Root System
Moderately shallow fibrous roots supported by extensive rhizomes. Fast establishment from seed but slower than Ryegrass; forms significant thatch over time; excellent sod-forming capability.
Growing Information
Origin Region
Native to Europe, Asia, and North Africa; naturalized throughout North America in temperate climates
Growth Habit
Rhizomatous (spreading via underground stems), formming a dense sod
Sunlight & Water Needs
Prefers Full Sun (6+ hours) but can tolerate light shade; moderate to high water requirements; enters summer dormancy during severe drought.
Mowing & Maintenance
Ideal height 2.5-3.5 inches; high maintenance; requires 2-4 lbs Nitrogen/1000 sq ft annually; benefits from regular aeration to manage thatch.
Special Characteristics
Excellent wear recovery due to rhizomes; highly popular for home lawns and sports fields; susceptible to leaf spot and dollar spot in humid conditions.
Ecological Information
Introduced species; provide soil stabilization; limited wildlife value compared to native grasses but offers cover for small insects; can be invasive in native prairie settings.