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Organic Materials Review Institute
(OMRI) Listed® Products

U.S. Borax produces refined boron fertilizer that supports organic farming.
We have specific products that are OMRI® Listed.

OMRI certificates: Granubor, Fertibor, Solubor, Solubor Flow and Optibor TG

Need to prove that your fertilizer ingredients are appropriate for organic farming?
Download our OMRI Listed certificates.
 



Fertibor: USA (PDF)



Granubor: USA (PDF)
Granubor: Canada (PDF)


Solubor: USA (PDF)
Solubor: Canada (PDF)
Solubor Flow: USA (PDF)

Technical Granular (TG)
Optibor TG: USA (PDF)​

What is OMRI?

OMRI is an international nonprofit organization that determines which crop fertilizer and soil amendment products are acceptable for use on certified organic crops under the USDA National Organic Program, and the Canadian Organic Standards OMRI is ISO 17605 accredited as a material review organization, meaning certifiers can accept the OMRI Listed seal anywhere in the world.

Currently, U.S. Borax offers four OMRI Listed products: Granubor®, Fertibor®, Solubor®, Solubor Flow, and Optibor® TG. All U.S. Borax products, including our OMRI Listed products, come from a clean, reliable, and fully traceable boron source that is further refined to ensure quality.




OMRI Listed logo

Learn more about OMRI
 

More registration certificates

Other organic industry organizations have certified U.S. Borax refined boron fertilizer products:
Soil Association Logo
 
Washington State Department of Agriculture logo

 

Request information
We have several agriculture products that are approved suitable for organic farming in the EU according to 2021/1165 Regulation. Ask your regional sales manager for more information.

Supporting resources

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Arsenic (As) is a naturally occurring, toxic heavy metal dispersed in the environment through a variety of industrial, mining, and agricultural activities. Hi... Read More

U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 500 customers with more than 1,200 delivery locations globally. We supply around 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles. Learn more about Rio Tinto.

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