Cannabis in Maine is legal for both medical and adult use.

Maine legalized medical cannabis on November 2, 1999, through a voter initiative. Maine went on to legalize cannabis for adult use in 2016.

Program rules can be found at: https://www.maine.gov/dafs/omp/sites/maine.gov.dafs.omp/files/inline-files/Administrative_Rule_18-691_CMR_ch1-Adult_Use_Marijuana_Program_Rule.pdf

Within the adult use framework, adults 21 years or older may use, possess or transport at any one time up to 2.5 ounces of marijuana or 2.5 ounces of a combination of marijuana and marijuana concentrate that includes no more than 5 grams of marijuana concentrate. Adults within their private residence may cultivate at any one time up to 3 mature marijuana plants. Within the medical framework patients may be in possession of up to 2.5 ounces of prepared marijuana and a total of up to 6 mature marijuana plants.