What are the main traditional propagation methods of orchids?

The traditional propagation method of orchids is mainly to propagate orchids by division, and the propagation speed is slow. Many varieties rarely set seeds under cultivation conditions. At the same time, because orchid seeds are extremely small and the embryos are not fully developed, they are difficult to germinate. They must rely on the supply of nutrients from primary fungi to germinate. Therefore, a lot of research has been done on aseptic sowing technology, and success has been achieved. Knudson (1922) discovered that orchid seeds can germinate when sown on an appropriate medium under sterile conditions. Seedlings can be obtained in test tubes and transplanted into large bottles. They will bloom in 5 to 6 years. This method has been used ever since. to date. Later, French Morel (1960) used tissue culture technology to culture the orchid shoot tip meristem in vitro, established a vegetative propagation line and induced plant differentiation.