- Brown hydrangea leaves are a signal that the plant is struggling with problems, from diseases to care errors.
- Improper fertilization, too much sun or excessive moisture are common causes of brown leaves.
- Learn how to properly care for hydrangeas and effectively fight diseases to enjoy their beauty.
Why do hydrangea leaves turn brown?
Brown leaves are one of the most common symptoms that something is wrong with the plants. In the case of hydrangeas, brown spots on the leaves may indicate diseases or care errors. The former include diseases such as hydrangea leaf spot or hydrangea anthracnose. Care mistakes that cause hydrangea leaves to turn brown include too intense or too little fertilization and too much sunlight.
In order for them to bloom, they need an appropriate location and substrate. These shrubs grow best in light, acidic and fertile soil regularly nourished with external fertilizers. Gardeners indicate that fertilizing hydrangeas should start in early spring and end in autumn. At the beginning of the growing season, fertilizers rich in nitrogen should be used. The ingredient supports the growth of shoots and leaves and is directly involved in… In autumn, nitrogen fertilizers should be omitted because it could artificially extend the vegetation period and prevent the plant from preparing for winter. Hydrangeas should also be watered regularly in spring and summer. These shrubs love moisture and, especially during hot weather, are exposed to problems related to water shortage. To improve the soil hydration level, it is worth spreading a layer of mulch around the hydrangea roots. It prevents water loss and prevents weed growth.
The most common fungal diseases of hydrangeas
Hydrangea leaf spot
It is one of the most common diseases that affect . It is caused by excess moisture and Cercospora and Septoria fungi. It manifests itself as small brown spots that appear at the bottom of the bush and over time spread to the top. To get rid of the disease, cut off the diseased shoots to prevent the spread of the fungus. Next, fungicidal sprays such as Miedzian should be used.
Hydrangea anthracnose
It is a serious disease caused mainly by the fungus Colletotrichum gloeosporioides. It manifests itself as black, round spots on leaves and flowers. It leads to complete death of shoots and falling. In its case, diseased shoots should be removed immediately and fungicides should be applied.
