What is the suitable temperature for growing orchids in different regions?

GeneralOrchidsall prefer warm winters and cool summers. Most regions of our country lie in the temperate and subtropical zones, which are all suitable fororchidgrowth. Except for the northeast and northwest, orchid growing is fairly common in all parts of the country. In most of the northeast, northwest and north China, winters are too cold, and outdoororchidcultivationis not suitable. Generally speaking, in winter orchids should be moved indoors, and in summer a shade shed should be set up to protect them from the scorching sun. The northernmost distributed Cymbidium species in our country areCymbidium goeringiiandCymbidium faberi. Along their distribution line, there is frost or short periods of snow cover in winter, and summer temperatures are relatively high. However, orchids mostly grow in places with trees, mostly in mixed broadleaf-conifer forests or bamboo forests, which both block the summer sun and heat and keep out the winter cold wind. In places covered with snow, the snow plays a protective role, and the ground temperature beneath the snow generally does not fall below 0°C. In the Beijing area, from late October or early November to late April of the following year, orchids need to be moved indoors or into a greenhouse forcultivationfor half a year. In the winter of the lower Yangtze River region, orchids also need to be brought indoors for growing. In Fujian, Guangdong, Guangxi, Yunnan, Sichuan, Taiwan, China and other regions, orchids (referring to terrestrial orchids) do not need to overwinter indoors in winter; while in Guizhou, Hunan and parts of Sichuan, appropriate protection is still needed in winter.Cultivatingorchids' site, compared with the orchids' native growing areas, is colder in winter and hotter in summer; moreover, worldwide climatic anomalies are also hard to predict; in addition, under artificial cultivation orchids generally have poorer stress resistance and weaker resistance. Therefore, in all parts of our country, cultivating orchids should adopt cold protection measures for winter. (Song Shi)