Advantages and disadvantages of planting orchid with coal cinder

Coal cinder not only permeates water and air, but also preserves water and fertilizer, light weight, no consolidation and wide source. because of high temperature, the orchid plant planted with coal cinder is less likely to suffer from diseases and insect pests. Cinder is beneficial to the change of orchid plant because it contains some minerals. These are its advantages. The low content of organic matter is its deficiency. Using cinder to cover the bottom can also form the disadvantage that the cinder at the bottom is long and wet and difficult to dry. (Zhang Bingfu)