1. It may be that too much water is given during daily water supply, so that a large amount of water will accumulate at the bottom of the basin, and the root system will be damaged after a long time.
2. It is also possible that some or all parts of the root system are burned by high concentration fertilizer due to uneven or excessive overall fertilization, so that the leaves will fall off.
3. The other reason may be that it was put outdoors in summer and burned the leaf tissue by strong light, so it lost its vitality.
1. If the water supply is too much, the plant can be put in the well ventilated sunlight to evaporate the water, or if the situation is very serious, it needs to change the basin for treatment, during which, if the root rots seriously, it needs to be repaired.
2. In case of too much fertilizer, it is necessary to add water to dilute, and then keep good ventilation and light.
3. If you are sunburned, you need to temporarily avoid light, ensure good ventilation, and timely restore water supply for a period of time.