Growing Green Roofs (image) American Society for Horticultural Science Caption This photo shows roof platforms showing different plot depths. The difference in plant growth between the three media depths is visible. Credit Photo by Kristin Getter Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.