Description Green Tree Medicinals offers organic, soil-grown, top-shelf medical marijuana to patients across the Front Range. We are now proudly offering recreational marijuana at our Northglenn location to in state and out of state residents 21 years of age and older. This family run company was founded in October of 2009 in Boulder, Colorado. Since then the founders have been growing affordab le, premium quality cannabis licensed by the State of Colorado with the passing of Amendment 20 of the Colorado State Constitution. Green Tree strives to offer a consistently effective experience in an inviting atmosphere.