Dendrobiums

Dendrobium is a large genus of orchids in the family Orchidaceae, comprising about 1,500 species. The plants show considerable diversity in habit and appearance, but most are epiphytic or lithophytic and possess cane-like growth with pseudobulbs. Many species have deciduous leaves that fall during a dry season, while others are evergreen. Flowers arise from the upper parts of new growth or from older canes and are often long-lasting, with a wide range of colors and forms.

Distribution and habitat: Dendrobium species are native to tropical and subtropical Asia, Australia, and the western Pacific. They occupy rainforest canopies, montane forests, and occasionally exposed rock faces, with adaptations to seasonal moisture regimes.

Cultivation and varieties: Dendrobiums are among the most cultivated orchids. Horticultural groups include cane-type species and hybrids, and the Dendrobium nobile alliance, which commonly flowers in winter to spring. Hybrids and cultivars are widely available and represent many growth forms and flower colors.

Culture and care: In cultivation they prefer bright, indirect light with good air movement and a distinct wet-dry cycle. Temperature tolerance varies with species; many cane-type dendrobiums prefer a cooler rest period in winter. Watering should be frequent during active growth and reduced during rest. Use a well-draining medium such as bark or a bark-perlite mix, and repot every 1–2 years as the plant expands. Fertilize lightly during growth.

Propagation, pests, and diseases: Plants are typically propagated by division of mature clumps. Pests include scale, mealybugs, and spider mites; root rot from overwatering is a common disease in cultivation.