Ohio Rev. Code Ann. § 905.49

Nothing in sections 905.31 to 905.503 of the Revised Code shall be considered either to restrict the distribution of fertilizers to each other by importers or manufacturers, who mix fertilizer materials for distribution, or to prevent the free and unrestricted shipment of fertilizer to manufacturers who are licensed or have registered their specialty fertilizer grades and brand names as required by sections 905.31 to 905.503 of the Revised Code.