The Brief Delaware has officially legalized recreational marijuana sales for adults 21 and over, with first-day sales beginning for 12 retail locations open across the state. Recreational marijuana sales for adults 21 and over officially began in Delaware on Friday, with 12 retail locations with medical marijuana conversion licenses now open to the public. Adult-use marijuana sales started in Delaware on Friday. The dispensaries themselves aren’t new since Delaware has had medical marijuana for the past decade. What's next:With recreational sales now legal in New Jersey, Delaware, Ohio, New York and Maryland.