In fact, some orchids are as easy to grow as cacti. Although there are more than 25,000 species growing in climates ranging from the arctic tundra to the tropical rain forest, the orchids most often cultivated are species from tropical climates. The beginning grower should consider starting with established plants which should bloom within a year. Seedlings are less expensive but may take up to five years to flower. Natural species may be grown, but the hybrids are often more vigorous and less demanding in their cultural requirements.
Light is often a factor limiting the growth of orchids.
Most orchids require relatively high light intensities and should be grown in an east or south window. However, a few will grow well under low intensity fluorescent lights. Orchids vary in their water requirements. Many tropical orchids are epiphytes, growing on the side of trees, and will not do well if their roots stay wet. Epiphytes should be grown in a very porous potting medium such as coarse fir bark, lava rock, or coarse perlite.