What is an OMRI Category?
An OMRI Category, or Listing, is a general category of materials used in organic crop production, food processing, and livestock production. Examples include “potting soil,” “fish meal” and “salt.” The specific categories used by OMRI are published as the OMRI Generic Materials List, and are included within the OMRI Standards Manual (and addendum), and are searchable online. Products are listed in the OMRI Products List according to their category. When applying for a product to be listed by OMRI, choose the one material listing that best fits your product. Categories are a useful way for buyers to find the type of product they are looking for.