Minn. Stat. § 21.88

A person is not subject to penalties for having sold seeds which were incorrectly labeled or represented as to kind, species, subspecies, if appropriate, variety, type, origin and year, elevation or place of collection if required, if the seeds cannot be identified by examination unless the person has failed to obtain an invoice or genuine grower's or tree seed collector's declaration or other labeling information and to take other reasonable precautions to ensure the identity is as stated.