This article is a list of diseases of hydrangeas (Hydrangea macrophylla).Common Names of Diseases, The American Phytopathological Society. Leaf spots caused by a variety of fungi can occur on hydrangea. A common leaf spot disease in the northeast is caused by the fungus Cercospora. Tan spots with reddish brown borders... Informational table showing disease name, symptoms, pathogen/cause, and management of Hydrangeadiseases. Read on to learn about the different hydrangeadiseases and how to control them. Native North American hydrangeas, like oakleaf hydrangea, usually resist diseases better than non-native types. Here are 10 common pests and diseases that can impact hydrangeas. Bacterial diseases are quite common in hydrangeas, and unfortunately, most bacterial diseases are not treatable. Fungal leaf spots and powdery mildew are among the most commonhydrangeadiseases. If you are growing hydrangeas for these reasons and more, and want to discover more about hydrangeadiseases, we take a look at eight of the most common. Other hydrangeadiseases. Rust and powdery mildew are two common issues in ornamental plants. Neither will kill the plant but they do affect the overall beauty. Understanding the most commonhydrangeadiseases, how to identify them, and what actions to take can mean the difference between a thriving garden and one plagued by issues.
