Winterhawk
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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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.
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• Always take a soil test and consult your local extension service or fertilizer dealer for specific recommendations.
• Sowing: depending on the results of the soil test, a complete fertilizer such as 16-16-16 is helpful for establishment.
• Correct soil acidity, best between 5.5 and 7.
• A minimum of 30-40 units of nitrogen after each grazing or cutting will maximize forage production.
Trials
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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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