Vermont Medical Marijuana Possession Limit Possession Limit (Flower): 2 oz. on their person, and no more than the yield of two (2) mature plants in their home. Those without a valid medical marijuana card can carry up to 1 oz. on their person, and the yield of up to two (2) mature plants in their own home. Possession Limit (Concentrates): 5 grams. This is for both medical patients and recreational cannabis enthusiasts.