The links included here are wonderful places to visit if you want to learn a bit more about Begonias. If you are planning a vacation, or simply want to learn more, these are wonderful resources.
Other Begonia Society links
Begonia Breeding Company links
Generally wholesale only, possibly open for tours with advance registration
Other Plant Society links
Rhododendron & Azalea
Bulb & Tuber Crops
Botanic Garden Links
Many can arrange tours for groups if given enough advance notice.