Blooming hydrangeas enrich every garden in summer. But what should you do if the plant looks sickly and the leaves turn black? Here you will find out what the cause can be and how you can treat it successfully.
What do black leaves on hydrangeas mean?
Black leaves on hydrangeas indicate a lice infestation. You can treat this with natural remedies. Other causes for the leaves turning black can be frost or leaf spot.
What is the reason for black leaves on hydrangeas?
A black coloring of the hydrangea leaves can indicate a lice infestation. The small pests secrete sticky excretions that remain on the leaves. This can cause the leaves to turn black and die.
How can I successfully treat black leaves on hydrangeas?
If the louse infestation is still limited, it may be sufficient to wash the pests off the leaves and stems with a hardwater jet. If that doesn't help, you can resort tonatural remedies such as nettle manure, milk or a mixture of rapeseed oil and soap.
Can there be other causes of black leaves?
If you notice black leaves on your hydrangeas in winter or early spring,Frost may be the cause. If the shoots or roots are frozen, the leaves can no longer be supplied with nutrients and they die.
Tip
Black spots on the leaves
If the leaves do not turn completely black, but initially only appear dark leaves that are brown to black and usually have a reddish border, this is leaf spot disease. You can get the fungal infestation under control by removing the affected plant parts.
