How to care for orchids in hot weather?

Summer is the most important season in the management of orchid cultivation all year round. In summer, the temperature rises gradually, the light is sufficient, and orchids enter a vigorous growth period. But the rainy season with high temperature and high humidity and the sultry summer weather are also hotbeds of orchid diseases. Therefore, summer is a critical period for the growth of orchids, and it is also a period of high incidence of diseases. Ventilation to prevent blue disease. Summer is the most difficult season for You Lan, because most diseases that plague You Lan break out in hot summer. Every summer, there are reports from You Lan (netizens) that blue diseases such as stem rot, soft rot and black spot occur frequently.

Ventilation in high temperature and high humidity environment in summer is the key to prevent and control blue disease. Experiments have been done, and wild orchids can still survive in the outdoor sun at 45 degrees, but their leaves will be burned. But in a hot, stuffy and unventilated environment above 35 degrees, orchids will get sick in an hour or two. In particular, grass, greenhouse seedlings and weak seedlings returned to the field are more likely to get sick because of their low immunity. The author once had the experience that orchids raised on the balcony railing on the fifth floor of the office door were ill for two consecutive years. Moreover, they were all sick in a short day or two because they were afraid that Lan could not stand the high temperature exposure and moved to an unventilated corner. A pot of soft rot of Dagong Jianlan Yinbian, and a pot of stem rot of iron bone and silver needle. Disinfection was carried out immediately after discovery, and the new seedlings were separated and planted and preserved. This shows the true meaning of the old saying "orchid cultivation, surface ventilation first". It should be noted that ventilation not only refers to the air flow in the balcony or orchid room under the fan, but also needs to take into account the loose permeability of plant materials and the permeability of orchid pots. Moreover, it is not allowed to keep the plant materials in a high water content state for a long time, so as to reduce the oxygen content of the plant materials, otherwise it will lead to respiratory obstruction in the roots of orchids and cause diseases.