Insufficient light: Rich trees need plenty of sunshine. If it is placed in a dark and humid environment, its leaves will turn yellow and fall off.
Too much or too little watering: the growth of rich trees needs a proper amount of water, and too much or too little will affect their growth. Under normal circumstances, it is advisable to keep the soil slightly wet when watering the rich trees.
Sudden temperature change: Rich trees like warm and humid environment. If suddenly affected by low temperature or high temperature, it is easy to cause yellowing and defoliation.
Lack of nutrition: Rich trees need proper nutrition to grow well. If the soil lacks nutrients, it is easy to make the leaves turn yellow and wilt.
It is suggested that you check the above reasons and take corresponding measures in time, such as adjusting illumination, watering amount and temperature. To provide a suitable growth environment for the rich trees. If the situation is serious, you can consider a plant store or a gardening expert for help.