Phalaenopsis is suitable for growing in a warm environment. If the temperature is too high, the plant will enter a dormant state. It will also accelerate the evaporation of water, causing the leaves to turn yellow due to water loss.Usually the summer temperature can not exceed 30 C, if the temperature is too high, need to spray water around the appropriate cooling, while maintaining good ventilation, in order to avoid bacterial growth.
Phalaenopsis likes moisture and needs sufficient nutrients in the growth process, but excessive water and fertilizer can easily affect the growth of the root system, and may also cause it to rot, and the leaves will fall off.Daily maintenance of watering must pay attention to the amount of water, do not let the pot soil have water.Fertilization is mostly in the vigorous growth period, a small number of times, fertilizer should be light rather than thick, generally choose compound fertilizer.
Phalaenopsis orchids are usually kept indoors in a bright place so that they can receive scattered light.If the light is too strong, the leaves are easily sunburned, resulting in yellowing.Usually the time to bask in the sun must be selected in the early morning or evening, at noon need to be properly shaded, winter sunshine is not strong, you can bask all day, help plants overwinter.
If the Phalaenopsis is infected with diseases and insects during the growth process, it will also cause the leaves to turn yellow.In view of this situation, it is necessary to cut off the diseased branches and leaves in time and burn them centrally in order to avoid the spread of pathogens.In addition, spraying drugs, usually with carbendazim or chlorothalonil for treatment, to eliminate pests can be sprayed with insecticides such as trichlorfon.