Causes and treatments for yellowing leaves of Dogwood

1. Too little watering

1. Reason: Insufficient watering is also an important factor in its yellowing. It likes a humid environment. If regular watering is insufficient or watering is not done on time and the soil is too dry, the leaves will dry up and turn yellow.

2. Treatment method: If the land is short of water, it is necessary to replenish water in time, cut off the yellow and dry branches and leaves, and replenish water and irrigate the soil thoroughly. Increase the frequency of watering until the situation improves and returns to normal.

2. The temperature is too high

1. Reason: Its heat resistance is insufficient. In the summer, the temperature under the sun is relatively high. If it is above 30 degrees Celsius for a long time, the leaf edges may become scorched and the leaves may turn yellow.

2. Treatment method: In the case of continued high temperatures in summer, it is best to move it to a more ventilated and cool place. If the plant cannot be moved, use a shade net to provide shade for it and spray water appropriately to cool it down.

3. Pests and diseases

1. Reason: It is prone to angular leaf spot disease, which can cause the leaves to wither and turn yellow, and fall off prematurely. It may also be due to pests such as leafhoppers, which can cause the paper strips to dry up and the leaves to turn yellow and fall off.

2. Treatment method: Get rid of yellow and diseased leaves in time. For angular spot disease, spray Bordeaux mixture every month from the beginning of summer until the end of summer. Pests such as leafhoppers should be sprayed with appropriate, targeted insecticides and should be dealt with immediately once discovered to avoid worsening of the condition.