Rhode Island passed the House Bill 6052 in 2006, which allowed patients with a "written certification" from their physician recommending the use of medical cannabis to sign up with the state's confidential registry, which issues identification cards. With these cards, possession of up to 2.5 ounces of usable cannabis as well as the cultivation of up to 12 plants is permissible. Rhode Island also allows visiting and qualifying medical marijuana patients with valid medical identification to medicate in the state. Find a medical marijuana dispensary in Rhode Island.