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Forage

Winterhawk

Common Name
Annual Ryegrass
Species
Lolium multiflorum

Winterhawk was developed in collaboration with OreGro Research and Dr. Gordon Prine of University of Florida. Selected during several cold winters in Nebraska, Winterhawk is the premier winter hardy annual ryegrass. Excellent cold and frost tolerance allows Winterhawk to thrive in those regions where annual ryegrass is normally compromised by cold weather. Winterhawk is an excellent addition to a forage program for all species of livestock where wide adaptability is needed.

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Details

  • Annual ryegrass can be planted almost year around. As long as nighttime temperatures are above 40 degrees and daytime temperatures are above 55 degrees, adequate germination and growth can be accomplished. Fall ... South: September through March, depending on location. Fall ... North: August through October. Spring: As soon as the temperatures are adequate. Can be frost seeded. If overseeding warm-season pastures, mow or graze warm-season grasses short before planting annual ryegrass to aid in establishment.  

Trials

  • Greenville, TN

    2020

    Tons/acre
    Winterhawk 4.44
    Fria 4.28
    FrostProof 3.71
    Meroa 3.51
    McKinley 3.15
  • Charleston, OH

    2019

    Tons/acre
    Winterhawk 4.09
    LowBoy 3.75
    FrostProof 3.58
    Rapido 3.31
  • Overton, TX

    2020

    lbs./acre
    Winterhawk 6,424
    Rapido 6,200
    Marshall 5,730
    Gulf 5,626
    FrostProof 5,481
  • Rome, GA

    2020

    lbs./acre
    Winterhawk 16,766
    Grits 15,274
    Lonestar 14,855
    Ranahan 14,427
    Marshall 13,498

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