Water plants (Tricker)
Gymnosperm Database
Coenosium Gardens
American Conifer Society
Internet Directory for Botany, Arboreta and Botanical Gardens
Botanical Garden Information System
Botanical Gardens of Russian Federation and post-soviet countries
National Institute for Agricultural Quality Control (in English)
National Agricultural Library and Documentation Center (in English)
Gardening forum
Link Collection of Gardening
Endemic Plants
Sapling.hu
Nursery.hu
Database of House Plants
