TerraTrove AmplAphex Biofertilizer Receives OMRI Listed Seal for Certified Organic Production

By AMVAC Corp.|10 June 2025

AMVAC, the crop business unit of American Vanguard Corporation, and DPH Biologicals, a leading developer and supplier of agricultural biologicals, have announced that TerraTrove AmplAphex, a liquid biofertilizer produced by DPH Biologicals and distributed regionally by AMVAC, recently received the Organic Materials Review Institute (OMRI) Listed seal.

“The OMRI Listed designation for AmplAphex is important because it confirms the suitability of the biofertilizer for certified organic production,” says Jim Thompson, Global Director of Biologicals for AMVAC. “With AmplAphex, farmers experience benefits like improved soil structure, vigor, water and nutrient use efficiency and plant drought and stress resiliency. The OMRI listing further affirms AMVAC’s commitment to increase the value, access and use of biological products for farmers in Western and Southern U.S. crop markets.”

OMRI listed products are reviewed and determined to be suitable for use in organic food and fiber production. This helps ensure compliance with the National Organic Program (NOP) standards. The OMRI seal on a product’s label indicates that it has been approved for organic use, except in Oregon and Washington.

OMRI’s mission is to support the growth and trust of the global organic community through expert, independent and transparent verification of input materials, and through education and technical assistance.

“Three years ago, we set out to develop the most convenient and highest performing Complete BioFertilizer using our well-known SP-1 Classic as a baseline. The multi-year performance data has consistently shown improved results with AmplAphex over SP-1 at a significantly lower use rate. We are excited that organic farmers now have access to this innovative technology,” stated Mick Messman, CEO of DPH Biologicals. AmplAphex is built on the RegenAphex Technology Platform and is paired with Beneficial Bacteria and Algae to form an all-in-one biological solution designed to amplify crop performance.

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AMVAC Corp. is a subsidiary of American Vanguard Corporation. American Vanguard Corporation is a diversified specialty and agricultural products company that develops and markets products for crop protection management, turf and ornamentals management, and public safety and animal health applications. American Vanguard is included on the Russell 2000 & Russell 3000 Indexes and the Standard & Poors Small Cap 600 Index. See all author stories here.

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