While there are hundreds of species distributed from Japan to India and south to Australia, New Zealand and the islands of the Eastern Pacific Ocean, the vast majority of species readily available can be grouped into a handful of culturally similar groups. An understanding of these groups, which species and hybrids belong to them, and their cultural idiosyncrasies, is critical to successful Dendrobium culture, but once you master them, these plants are wonderful performers. This presentation summarizes the general needs of dendrobiums and looks in detail at each of the cultural groups with examples of species and hybrid groups that belong to them.