This extensive website is based in Georgia, but features content from all over the world. This website boasts a blog, relevant greenroof-related news, and green roof videos.

This Corvallis, Oregon-based University’s website features basic information about green roofs and their history. It also features information about two green roof demonstration projects at the University itself.

This nursery, located in Maryland, has a wealth of information about plants suitable for green roof projects. To date, Green Roof Plants has worked on nearly 300 roofs in 19 different states, and has a substantial research and development portion of their website.

EcoRoofs Everywhere is a clearinghouse of ecoroof facts based in the Portland, OR and Vancouver, WA metro areas. This website features information about ecoroofing projects in the Pacific Northwest, as well as upcoming workshops for those interested in learning more about ecoroofing.

This organization was founded in 1999, and currently hosts events in several different cities on both coasts. Green Roofs for Healthy Cities seeks to research ways to make green roofs economical, and disperse that information to consumers and the professional community alike.