1、 The sun is too strong

1. Reason: Begonia flowers prefer sunshine, but they can't bear strong direct light. If the sun is too strong in its environment, its sunny leaves will be sunburned and turn yellow

2. Treatment: cut off the yellow leaves on the plant. Then transfer it to a ventilated place and wait for it to slowly recover and grow new leaves

2、 Soil ponding

1. Reason: Begonia flower likes a humid growth environment, but it can't bear wet and waterlogging. If it is watered too much during breeding, or the waterlogging is not drained in time after rain, so that there is water in its soil, it may cause its root system to be injured and yellow leaves will appear

2. Treatment method: first take it out of the soil and cut off rotten roots and yellow leaves with scissors. After that, prepare some new soil with good drainage and plant it into it

3、 Excessive fertilization

1. Reason: its growth needs fertilizer to provide nutrients. However, it absorbs fertilizer at a limited rate. If it is fertilized too frequently during breeding, it will have no time to absorb fertilizer. Excess fertilizer left in the soil will damage its roots and lead to yellow leaves

2. Treatment method: if possible, it's best to remove it from the basin, wash the root system and plant it in new soil for maintenance. If you don't want to change the soil, you can also wash away the fertilizer in the soil with water and then maintain it