How much cannabis can I possess in Rhode Island with an MMJ card?

In Rhode Island, you can possess up to 2.5 ounces with a valid medical marijuana card.

Patients or their caregivers can grow up to 12 mature plants and 12 immature plants with Plant Tag Certificates.

Adults 21 and older can possess up to 1 ounce and grow up to 6 plants, with no more than 3 mature.