What should I do if there are black spots on hydrangea leaves?

Hydrangea , also known as hydrangea, is a popular plant that can be used for garden landscaping and is also suitable for home potted plant maintenance. It is known for being easy to grow, but during maintenance, black spots sometimes appear on the leaves, which may be caused by a variety of reasons. Let’s learn together what to do if there are black spots on hydrangea leaves?

1. Lighting conditions

They prefer plenty of light, but should avoid strong direct light, as prolonged strong light may cause the leaves to turn black. In the summer, when the sun is particularly strong, hydrangeas need to be provided with shade to protect them from damage.

2. Watering problem

If you water hydrangeas too much during maintenance, water accumulation at the roots may cause black spots on the leaves. In this case, the accumulated water should be drained in time, the soil should be loosened to increase the air permeability of the soil, and the plants should be placed in a well-ventilated environment, so that the black spots will gradually fade away.

3. Fertilization management

Fertilization also needs to be moderate. Excessive fertilizer will damage the roots of hydrangeas and cause the leaves to turn black. In this case, water generously to dilute the fertilizer in the soil and reduce the amount of fertilizer applied to give the plant time to recover.

4. Disease problems

Diseases are also one of the reasons why black spots appear on hydrangea leaves, such as leaf spot, black spot or anthracnose. When faced with the disease, the infected leaves should be cut off in time and appropriate fungicides should be sprayed to control the disease.

5. Temperature conditions

Temperature is also important to the growth of hydrangeas. The temperature range for their growth is 15 to 28 degrees Celsius. Temperatures that are too low may cause the leaves to freeze and turn black and fall off, while temperatures that are too high may cause the plant to wilt. Therefore, attention should be paid to cooling down in summer and keeping warm in winter to ensure the healthy growth of hydrangeas.

In short, when caring for hydrangeas, you still have to maintain the living environment conditions it requires and do not be careless about daily maintenance.