Have you noticed a white coating on your hydrangeas? Don't worry, if you act quickly now it won't harm the bushes. You can find out exactly what it is and how you can remove the coating in this article.
What does a white coating on hydrangeas indicate?
A white coating on hydrangeas is a sign of powdery mildew. It usually appears first on the top of the leaf. The fungus can cause the plant to dry out, which is why you should act quickly. You can fight the fungus with sulfur or milk. With a dry location you prevent future infestation.
What causes a white coating on hydrangeas?
The white coating is powdery mildew. The fungus usually attacks the tops of the leaves of hydrangeas and can look both white and dirty brown. If you don't act quickly, the fungus will cause the leaves to dry and curl.
How can I successfully remove the white coating?
You can treat mildew on hydrangeas with sulfur (€6.00 on Amazon). If you would rather try home remedies, you can also mix milk and water in a ratio of 1:10 and spray the affected parts of the plant with it. To successfully remove mildew, you should repeat the application several times until the white deposit disappears.
What can I do to prevent mildew?
The fungus that is responsible for mildew and thus the white coating spreads inhumid, warm weather On rainy days in spring and summer, make sure that the Hydrangea is as protected as possible and does not get wet from the rain. When watering, you should also make sure that you water from below, especially in warm temperatures, and that the leaves do not get wet.
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Other causes of white deposits
A white coating on hydrangeas can also be an infestation of mealybugs. If you look closely you will see the small hairy pests and can clearly distinguish them from mildew.