Dendrobiums may be the quintessential orchid in a family of spectacular floral showpieces.  As one of the largest, most diverse orchid groups, the often tropical, showy Dendrobium embodies both the exotic beauty and sheer variety of the orchid family.  Many of the Dendrobiums we know and grow are tropical in origin, but Dendrobiums are native to places as diverse as the foothills of the Himalayas, the jungles of Southeast Asia, and even the outback of Australia.  Diverse Dendrobium species can certainly thrive in a variety of natural habitats.  While the sheer variety of Dendrobium species makes it difficult to generalize about universal Dendrobium care requirements, there is one important commonality…