Farmington Hills, MI Cannabis Regulations: Home Cultivation (2026)

Michigan recreational cannabis authority sits in the Michigan Regulation and Taxation of Marihuana Act (MRTMA), MCL 333.27951 et seq., adopted by voters in November 2018 as Proposal 1. Under MCL 333.27955(1)(d), an adult 21 or over may possess, store, and process not more than 10 ounces of marihuana within their residence and may cultivate not more than twelve (12) marihuana plants for personal use, provided that: (a) the plants are not visible from a public place without binoculars, aircraft, or other optical aids; (b) the cultivation takes place in an enclosed area equipped with locks or other functioning security devices that restrict access to the area; and (c) the marihuana, including concentrate or marihuana-infused product, is stored within the same single residence. Possession on the person outside the residence is limited to 2.5 ounces (MCL 333.27955(1)(a)) with no more than 15 grams in concentrate form. Michigan medical patients separately retain home-grow rights under the Michigan Medical Marihuana Act (MMMA), MCL 333.26421 et seq., with twelve (12) plants per qualifying patient (registered caregivers historically up to 72 plants for five patients, now restricted under more recent MRTMA implementation). Section 6 of MRTMA (MCL 333.27956) allows a municipality to adopt an ordinance to 'completely prohibit or limit the number of marihuana establishments within its boundaries' — but Section 6 expressly limits this opt-out power to commercial 'marihuana establishments' (growers, processors, retailers, secure transporters, safety compliance facilities) and does NOT authorize a local prohibition of personal-use home cultivation under MCL 333.27955. Farmington Hills has exercised its Section 6 opt-out for commercial establishments but cannot lawfully prohibit personal home cultivation by adults 21+. The 12-plant household ceiling is statewide regardless of how many adults live in the home. Cultivation outside the home (yards, balconies, sheds visible to the public) is unlawful even on private property. Combustion or vaporization in public view, in vehicles, or in places where it would violate Michigan's smoke-free workplace law remains prohibited. Use by adults under 21 remains unlawful under MCL 333.27963. Federal law (21 U.S.C. 812) still classifies marihuana as Schedule I and federal possession or cultivation on federal property remains a federal crime regardless of state law.