1、 Improper watering

1. Reason: the leaves of happiness tree may fall because of the wrong way of watering. Watering too much will lead to its rotten roots, and watering too little will lead to its lack of water. Both of these reasons may lead to its leaves falling

2. Remedy: if it is caused by too much watering, take it out of the flowerpot, cut off the rotten roots and replant it. Keep ventilation and control water properly until it recovers. If it is caused by too little watering, the watering shall be increased appropriately to keep the basin soil in a slightly wet state until it recovers

2、 Too weak light

1. Reason: it is a light loving plant and cannot grow in dark places for a long time. Because of the lack of sunlight in dark places, it cannot synthesize nutrients normally. If you put it in the shade for a long time, it may have the problem of falling leaves

2. Rescue method: at this time, move it to a place with sufficient light for maintenance. Properly let it receive some soft sunlight and wait for it to recover

3、 Metabolism

1. Reason: the normal withering of new leaves may also cause its leaves to fall. Because the rate of nutrient synthesis of old leaves will decrease, the plant will make the old leaves fall off naturally in order to make room for the new leaves to grow

2. Remedy: at this time, there is no need to take any measures. As long as it is maintained normally, when its old leaves fall off, new leaves will naturally grow