The principal public garden association in North America, home of the Public Garden Magazine.
BGCI.orgPreeminent global organization on botanic gardens and conservation. Excellent information on gardens around the world.
Conservation.orgConservation International-one of the leading global agencies working to protect biodiversity.
Sanbi.orgWorking to conserve the remarkable biota of South Africa.
ahsgardening.orgThe American Horticultural Society, great information on gardening, plants and gardens.
rhs.org.ukThe Royal Society based in the UK. Excellent information on plants, gardening and gardens.
worldwildlife.orgWorld Wildlife Fund. Working to conserve biodiversity around the globe.
esa.orgEcological Society of America. Great information and publications for understanding ecological functions in nature.