DENDROBIUM (den-DROH-bee-um) - Dendrobium orchids are called "Phalaenopsis type" because their flowers resemble those of the Phalaenopsis variety. Phalaenopsis type are evergreen, while other varieties of Dendrobiums shed their leaves in the fall and winter. Dendrobiums are also commonly used as cut flowers because of their sturdy stems and distinctive coloring.
Temperature: The ideal day temperature is 75-85 °F, while the ideal night temperature is 60-65 °F. Occasional temperature extremes are tolerated if exposure is not prolonged.
Light: These dendrobiums enjoy full morning sun, but will require shading between 11am and 3pm - less shading will be needed in late afternoon. An overhead light source is most effective.
Water: Phalaenopsis-type dendrobiums grow best when their potting medium becomes dry between waterings. They are epiphytes in Nature, (i.e. - they grow on trees) and are accustomed to becoming fairly dry between the rains of their natural habitat.
Repot: Repot once every two years in Spring, after blooming, or when new growth starts. A mix of 10 parts fine-grade Fir-bark and 1 part orchid mix will work well in 6" pots and smaller, while medium-grade Fir-bark works well in larger pots.
Feeding: High-nitrogen fertilizers (25-9-9) can be used year-round at one teaspoon per gallon of water. Feed once a month.
RECOMMENDED BOOKS - Orchids by J. Dunmire; Ultimate Orchids by T. Sheehan