If you're not familiar with the Organic Materials Review Institute, it might be good to brush up.
The Organic Materials Review Institute, or OMRI, is a useful 501(c)3 nonprofit organization that can help your organic business. Their main goal is to determine which input products are allowed or not allowed in organic production and processing and they maintain an extensive list of these inputs. Furthermore, OMRI provides technical support and training for professionals who work in the organic industry, offers product listings for suppliers, gives advice and guidance on evaluating products and educate folks on organic compliance.
...