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Tetra Mag Intermediate Perennial Rye Grass


Tetramag is a true dually-beneficial hybrid; carrying the superior forage yield and feed value of an Italian ryegrass with the persistence and durability of a perennial ryegrass in one, very impressive package. No matter the university variety trial location, Tetramag is turning heads on overall yield, seedling vigor and establishment, regrowth, and forage quality, especially on fiber digestibility compared to other competitive perennial ryegrasses. Whether you’re considering a perennial ryegrass, or a shorter-term ryegrass as part of a grazing/haying operation, or extending an alfalfa or red clover stand, or in a pasture/hay mix, Tetramag needs to be a part of your plan.

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  • Exceptional yield
  • 20 trial years of university data – 17.4% higher yield than the average trial mean!
  • Superb forage quality
  • Excellent seedling vigor
  • Persistent
  • Cold tolerant


Tetramag readily establishes on loosened bare soil or in close cut harvested fields for interseeding or cover crop use. For typical new seeding applications apply at a rate of 25-35 lbs. per acre and 5-10 lbs. per acre into thinning alfalfa stands. Use a Brillion seeder, a no-till drill or broadcast followed by a culti-packer. Seed to soil contact is critical to successful germination and establishment. For highest quality hay harvest at first boot stage


Proper management begins with correct fertilization. Soil sampling is a great tool to get baseline soil fertility inventory, especially on pH, organic matter, phosphorus, potassium and other macro and micro elements to best determine application rates based on soil maintenance and nutrient removal. Correct nitrogen application rates should consider organic matter, yield goals, stocking rate, etc. Your local agronomy input supplier or extension service can provide valuable regional information. Control broadleaf weeds as necessary.