AFX 455HVX HarvXtra® Alfalfa Seed

HarvXtra® Alfalfa with roundup ready technology    Roundup Ready® Alfalfa

PERFORMANCEAlfalfa Technology Sheet PDF Download Button

  • AFX 455-HVX is an alfalfa seed with the HarvXtra® trait and Roundup Ready® technology used to produce the highest quality alfalfa forage in the industry
  • Strong disease resistance package and is very winterhardy
  • High yield potential in multiple growing environments



  • Early season weed control with glyphosate herbicides helps improve establishment success and first year yield potential compared to conventional varieties
  • Choice of delaying cutting by 7-10 days or cutting for highest RFQ


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Seeding Rates

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Yield Rating Key: 5 = Best; 3 = Average; 1 = Poor

Agronomic Yield Ratings are based on average performance between Alforex varieties. Actual performance may be adversely affected by extreme conditions. Unless stated, ratings are based on standardized testing procedures endorsed by the North American Alfalfa Improvement Conference.

FastGrowth Ratings are calculated by Alforex Seeds from weekly measurement of varieties grown side-by-side from green-up to harvest through the growing season. Expressed as average centimeters growth per day.  >2.20 = Very Fast; >2.00 = Fast; >1.80 = Average; >1.60 = Slow; <1.60 = Very Slow

Pest Resistance Ratings

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IMPORTANT: Agronomic ratings based on period-of-years testing through 2018 harvest. Pest resistance, dormancy, winter survival and winterhardiness ratings based on standard test protocols prescribed and endorsed by the North American Alfalfa Improvement Conference (NAAIC) and were the latest available at the time of the publication. Ratings may change over additional years of data collection, or if NAAIC protocols change. Contact your sales professional before planting for the latest trait rating information. 

DISEASE RESISTANCE INDEX: DRI is a disease index based on the following pests: Bacterial wilt, Verticillium wilt, Fusarium wilt, Anthracnose, Phytophthora, and Aphanomyces (Race 1 and Race 2). HR = 5 points, R= 4 points, MR = 3 points, LR = 2 points, S= 1 point. Highest possible DRI = 35 points.

HarvXtra® is a registered trademark of Forage Genetics International, LLC. HarvXtra® alfalfa with Roundup Ready® technology is enabled with Technology from Nobel Research Foundation Institute, LLC. Roundup Ready® is a registered trademark of the Bayer Group, used under license.

Do not export alfalfa seed or crops containing Roundup Ready® technology including hay or hay products, to China pending import approval. In addition, due to the unique cropping practices, do not plant this product in Imperial County, California.  Purchase and use of HarvXtra® alfalfa with Roundup Ready® technology is subject to a Seed and Feed Use Agreement.

Always read and follow pesticide label directions. Alfalfa with Roundup Ready® technology provides crop safety for over-the-top applications of labeled glyphosate herbicides when applied according to label directions. Glyphosate agricultural herbicides will kill crops that are not tolerant to glyphosate. ACCIDENTAL APPLICATION OF INCOMPATIBLE HERBICIDES TO THIS VARIETY COULD RESULT IN TOTAL CROP LOSS.

Corteva Agriscience is a member of Excellence Through Stewardship® (ETS). Corteva Agriscience products are commercialized in accordance with ETS Product Launch Stewardship Guidance and in compliance with the Corteva Agriscience policies regarding stewardship of those products. In line with these guidelines, our product launch process for responsible launches of new products includes a longstanding process to evaluate export market information, value chain consultations, and regulatory functionality. Growers and end-users must take all steps within their control to follow appropriate stewardship requirements and confirm their buyer’s acceptance of the grain or other material being purchased. For more detailed information on the status of a trait or stack, please visit

Excellence Through Stewardship® is a registered trademark of Excellence Through Stewardship.

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