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Kentucky Bluegrass

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Scientific name:Poa pratensis L.
Cultivars:Several
Origin:Europe
Growth Habit:Sod-forming, 1 to 2 1/2 ft tall
Life Cycle:Perennial
 
Use
 
Production:
  • Lowest yielding of cool-season grasses used for pasture
  • Commonly used as a pasture grass.
  • Common in unimproved pastures in Wisconsin.
  • Well adapted to less-managed pastures if they have a low stocking rate.
  • Nutritive Value:
  • Good quality, highly palatable to livestock
  • Inferior to early-cut timothy
  • Herbaria Image:Click this link
     
    Identification
     
    Seed Head:Panicle (open type)
    Seed:1/8" in size
    Shoot:Slightly flat stem
    Creeping rhizomes (underground stems) present
    Leaf:Narrow, boat-shaped tip, 2 to 12 in long, smooth, green to dark green
    Auricles:Absent
    Ligule:Small, membranous
     
    Adaptation
     
    Soil:Fertile, moist, well drained
    pH:6 to 7
    Moisture:
  • 20 to 50 inches of rainfall.
  • Requires adequate moisture.
  • Low drought tolerance
  • Temperature:
  • Grows most in spring and fall
  • Semi-dormant in hot summers. Does better in cool summers (60 to 90°F)
  • Winter hardy.
  • Other:One of the most cold tolerant grasses
     
    Establishment - Management
     
    Seeding rate:
  • 8 to 15 lb/acre (seeded alone)
  • 2 to 8 lb/acre (in mixtures), lower rate for multiple species; higher rate when 1 or 2 species in mixture
  • 4 weeks to germinate
  • Seed cost:$120 to 200+/50 lb
    Planting date:
  • Late summer: mid August to mid September
  • Spring: as early as weather allows and seedbed can be prepared.
  • Planting depth:<1/4 inch
    Frost seeding:Not recommended due to long time to germination
    Fertilization:
  • Apply P and K according to soil test.
  • Nitrogen should be applied directly before or with planting if not following a crop heavily fertilized with N, or planted with legumes.
  • Grazing:
  • Do not graze close, but it can tolerates occasional close grazing.
  • Allow for a stubble of 2-4 inches
  • Tolerates heavy traffic when allowed to form a thick sod.
  • Recovers quickly from trampling
  • Hay:
  • Low yielding for hay production
  • Commonly used in hay production for horses due to high fiber content.
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    Notes