Chlorophyll synthesis in orchids is inseparable from sunlight. We usually see that the leaves of plants are very thin, and the green color is not straight or strong, because the lack of light can not synthesize enough chlorophyll.
However, light is a double-edged sword. If there is not enough light, chlorophyll cannot be synthesized. If the light is too strong (especially at noon), the orchid leaves will be burned, and under too strong light, the orchid leaves will also appear yellow and old.
It is suggested to get as much sunshine as possible before 10 every morning. The sun after 10 depends on the season, which can be used in winter and early spring, and should be avoided in other seasons.
Orchids like humid and ventilated environment. If the environment is too dry, orchid leaves will lose water and wither. However, in a poorly ventilated environment, orchid leaves are prone to black tips and even diseases.
Orchids require that the upper part is wet and the lower part is dry. Humidity in the air can make the leaves of orchids wetter, while dry planting materials can ensure the roots of orchids to breathe freely. Raising orchid roots well is the basis of raising leaves well.
Magnesium is indispensable for the synthesis of chlorophyll in orchid leaves. This is a trace element, which is not commonly used in ordinary fertilization. If plants lack magnesium, they can't synthesize chlorophyll, so the leaves of orchids will look yellow and thin.
When raising orchids, you can apply a small amount of magnesium-containing fertilizer (be careful not to chlorinate), and generally you can use magnesium sulfate, which is both medicine and fertilizer. The principle of applying is to apply as little as possible, rather light than strong.