What are the methods for increasing humidity when growing orchids on a balcony?

Balconies are windy, and orchid pots dry out easily. One of the keys to gettingorchidsto grow as well as they do at ground level is humidity. Over many years of growingorchidson a balcony, the author has found that the following methods can be used to increase and retain humidity. (1) Use a water reservoir to retain moisture. Many homes today have anti-theft mesh railings extending out from the balcony. You can lay old wooden boards, bamboo strips, thin plastic sheets, etc. on the mesh railing, then spread eight-gauge-thick plastic film over them to make a water reservoir, and place the orchid pots on the reservoir. The natural evaporation of the water in the trough raises the humidity of the air in the small environment around the orchid pots. (2) Use a larger number of orchid pots grouped together to retain moisture.On a balconygrowing orchids, growing many is better than growing few, because the fewer the orchid pots, the faster the air circulates, and the moving air carries away large amounts of moisture from around the pots, causing dryness and dehydration. If there are many orchid pots placed densely so that they affect one another, not only does this matchthe orchid'sgrowth character of "liking to live in groups and fearing solitude", but the air humidity can also linger around the orchid pots for a long time, which benefitsthe orchids'growth. Therefore, the author's approach is to place them densely in multiple layers to retain humidity. (3) Use climbing plants to retain moisture. Boston ivy grows large, dense, neatly arranged leaves in summer. Not only is it beautiful and of very high ornamental value, but more importantly its leaves block intense light and heat radiation, while the leaves transpire large amounts of water, which can make the entire balcony space a relatively humid small environment. (Hu Binglin)