The Cactus.Doctor.com (Cactus Gardening in Phoenix)

The Cactus and Succulent Plant Mall

CactiGuide.com

Cacti and Succulents Forum Questions/answers on care, cultivation tips, sources for plants.

The Cactus Museum

Justin Spiegel's Desert Cactus Page --A very informative cacti/succulents site

Columnar Cacti Site Lots of nice pictures

Desert Ecology -- The Deserts of North America

Flora.boskowan.cz A very nice Succulents and Cactus page from the Czech Republic

CactusPlaza Dutch. Online cactus nursery specialized in Lophophora, Trichocereus, Selenicereus and Pereskiopsis. Information on cactus propagation. Plants and seeds can be ordered in the online shop

Plants Data Base

University of Conn. Desert Plants Page

University of Arizona Arid Plants Page

University of Catania Succulents Page

USDA Zone Chart

USDA: Plants Data Base

Cold Hardy Cacti page

List of Cold Hardy Cacti

Cacti Care

Bohemia Cactus: Server about cacti and succulents, books, journals etc.

Nurseryman.com A Nursery Resource page

The Garden Watchdog Consumer feedback.

Desert Plant Books .