Like any plant, the climbing hydrangea can be affected by various diseases. However, if your leaves turn brown, fungi or viruses are not always to blame.
What causes brown leaves on climbing hydrangeas?
Brown leaves on a climbing hydrangea can be caused by sunburn, leaf spot or malnutrition. As a preventative measure, you should slowly accustom the plant to sunlight, avoid wetting the flowers and leaves when watering, and make sure you have the right soil.
Climbing hydrangea slowly get used to the sun
Although climbing hydrangeas can generally be planted in sunny locations, they feel much more comfortable in sunny to shady places. Depending on how strong the sun is, sunburn can occur mainly in spring, but also at any other time of the year. You can recognize one of these by dry, brown spots on otherwise he althy leaves.
Brown spots also due to leaf spot disease
If brownish to blackish spots, often with a darker edge, form on the leaves during the growing season, leaf spot disease caused by harmful fungi is often the cause. Their spread is primarily aided by moisture, but can be contained by densely planted plants. Make sure that you do not wet the flowers or leaves of the climbing hydrangea with water when watering. If the infestation is minor, it is sufficient to remove the affected leaves; if the infestation is severe, the plants should be treated with a suitable fungicide.
Tips & Tricks
If, on the other hand, the foliage increasingly loses color and gradually turns yellow, the cause is either malnutrition or incorrect soil.
