What Causes Spots on Hydrangea Leaves

Leaf spots To control leaf spot, avoid watering your hydrangeas from overhead, and again, remove and destroy diseased plant parts. If summer rains make the problem worse, try a fungicide such as Immunox (always follow label directions).

How do you treat spots on hydrangea leaves?

Leaf spots To control leaf spot, avoid watering your hydrangeas from overhead, and again, remove and destroy diseased plant parts. If summer rains make the problem worse, try a fungicide such as Immunox (always follow label directions).

How do you get rid of black spots on hydrangea leaves?

Fill a spray bottle with 1 pint of tepid water and 1/2 tablespoon neem oil and mix well. Spray the stems and tops and bottoms of the leaves of the hydrangeas and discard the solution, as it breaks down within hours after mixing. Neem oil treats black spot and a host of other fungal diseases, such as cercospora.