Φυτά United States Department of Agriculture,
Natural Resources Conservation Service,
Plants Database Link : http://plants.usda.gov

Links for Green Roof
International Green Roofs Association
http://www.igra-world.com/intro.html

EFB - European Federation of Green Roof Associations
http://www.efb-bauwerksbegruenung.com/start_englisch.html

Scandinavian Green Roof Institute
http://www.greenroof.se/

Pennsylvania State University, Center for Green Roof Research
http://hortweb.cas.psu.edu/research/greenroofcenter/index.html

Pennsylvania State University, Institute of Energy and the Environment
http://www.environment.psu.edu/

North Carolina State University
http://www.bae.ncsu.edu/greenroofs/

Independent UK resource for green roof information.
http://www.livingroofs.org 

Green Roofs for Healthy Cities. North America.
http://www.greenroofs.org

The green roof industry resource portal (USA).
http://www.greenroofs.com 

Global networking for green roofs.
http://www.igra-world.com/home/index.html

Green Roofs Australia.
http://greenroofs.wordpress.com/

Green Building Blocks
http://www.greenbuildingblocks.com/index.go

Urban Agriculture
http://urbanagriculture.wordpress.com/

Green Roof Center Sheffield
http://www.thegreenroofcentre.co.uk/