If you find brown leaves on your hydrangeas, then something is wrong. You can find out what the symptom could be and how you can treat it successfully in this article.
What causes can cause dark leaves on hydrangeas?
The most common cause of brown leaves on hydrangeas is leaf spot. But too strong sun, drought, incorrect fertilizer application or pests can also cause dark discoloration on the leaves.
Why do hydrangeas get dark leaves?
Dark leaves on hydrangeas can be the first sign ofdisease, incorrectlocationor impropercarebe.
What diseases cause dark leaves on hydrangeas?
TheLeaf spot disease is the most common cause of dark leaves on hydrangeas. It manifests itself as red to almost black spots with a dark border on the leaves. The cause of the disease is a fungal infection that occurs primarily in warm and humid weather. Protect your hydrangea by keeping it as dry as possible and removing affected leaves immediately.
Can heat cause dark leaves on hydrangeas?
In summer, on particularly hot days, hydrangeas can suffersunburn. This can manifest itself in dark, burnt, sometimes mushy leaves. The affected leaves usually curl up, and hydrangeas affected by sunburn usually leave their flowers hanging. Immediately move your hydrangeas out of the sun and water them heavily to help them recover quickly.
How can my watering behavior influence the darkening?
Whendrought, the leaves of hydrangeas behave similarly to heat: they turn brown, curl up and finally fall off. But hydrangeas can also react to too much water with brown leaves. Always adapt your watering behavior to the circumstances.
Are there any other care mistakes that lead to brown discoloration?
Excessive or incorrect fertilization can also harm hydrangeas. They react to the abundance of nutrients with dark leaves. If you suspect over-fertilization, you should stop applying fertilizer until next spring.
Tip
Spider mites can cause dark leaves
An infestation with spider mites usually progresses slowly. The leaves initially turn yellow where the pests bite, the spots then become larger and larger until the foliage dries up. However, if the leaves turn black, another pest is usually responsible.