Foreign orchids are mostly floating orchids, which are different from Chinese orchids (which are terrestrial orchids). They are tropical orchids.

Tropical orchids have a longer flowering period: the long-span orchid of Malagasy, which blooms from December to February; the fritillary orchid of Sikkim, which blooms from January to April; the orchid of Guatemala, which blooms from December to February; From November to March; the flame orchid in India blooms from early spring to summer; the Shiva bear valley orchid in Colombia and the tuber orchid in Ecuador bloom almost all year round. Tropical orchids have large corollas: the orchid from Sumatra has a flower diameter of 10 centimeters; the bamboo orchid from Mexico has a flower diameter of more than ten centimeters; the Cadolia orchid has a corolla diameter of up to 30 centimeters, which is very spectacular and is known as As the "King of Yanglan".