1、 Insufficient light

Sunflower has a great demand for light and is suitable for direct light. If there is no sunlight, it is difficult for sunflower to grow normally and absorb no sunlight. The plant gradually weakens and the leaves will fall. It is best to move the sunflower to the outdoor for maintenance and contact with sufficient sunshine. If it is maintained indoors, it should also be placed where the sun can shine to maintain the growth demand

2、 Improper water and fertilizer

In the normal growth process, the requirements for water and fertilizer are not large. It only needs to be watered and fertilized regularly. If the application of water and fertilizer is unreasonable, there will be problems in the root, the growth condition of the whole plant will become bad, and the leaves will fall naturally. Attention should be paid to the reasonable application of water and fertilizer and appropriate adjustment according to the situation

3、 Temperature discomfort

Temperature is also an important point. It can withstand high temperature weather, but in a cold climate, growth will be affected. Cold wind will cause frostbite and leaves will fall. It is necessary to ensure a good temperature, and the appropriate range is about 20-25 ℃

4、 Metabolism

A small amount of fallen leaves may be caused by environmental changes. There's no need to worry about this. Just continue the maintenance