Observations on the Survival of 112 Plant Taxa on a Green Roof in a Semi-Arid Climate

The Denver Botanic Gardens (DBG) green roof, built in November 2007, is the first green roof on a city owned building in Denver, Colorado. To date, 112 plant taxa have been trialed, observed, and described on this low water green roof in the high and dry climate of the Colorado Front Range. Plant taxa survival was documented based on the original number of plants installed, and the surviving plants were rated on a scale of 1-4. Additionally, in 2011-2013, plant heights and widths were recorded. The data indicate that taxa can be grouped into categories of perish, survive, and thrive.