Dendrobium is a diverse genus of orchids with different cultural needs. Many go through a growth phase and then a rest phase during the course of one year, and must be given water and temperature to match these periods of growth and rest.
Flowers can last one day to many weeks, depending on the type.
Species such as Den. Treat this growth as a summer growth cycle. These grow well with phalaenopsis, except for the rest period. Plants will go deciduous if grown too cool and dry. Most are large, vigorous plants with long-lasting flowers in summer to several times a year.