The Clean Green Certification for cannabis crop producers was established in California in 2004, and has since expanding globally. The Clean Green cannabis crop producer certification is for the grower-farmer who acts in a legal and respectful manner with his or her surrounding environment. The Clean Green program allows this quality farmer to be distinguished from the rest with a label that stands for legal compliance, consumer quality and environmental stewardship. View our 2020 featured Clean Green Certified member directory of our top crop producers & processors. To request an application, please fill out our form to be certified and a featured member.