You may notice that the plant slowly begins to decline. Hydrangea ringspot virus can be first identified by the yellowing of leaves. These are two different viruses that are very similar in appearance, as well as in how they are transmitted. Ringspot Virus Leaves will begin to yellow and your plant will slowly begin to decline. Do not compost the plant! This will cause the virus to spread through your compost and will eventually infect whichever plants come in contact with the compost. If your plant has become infected with this virus you should remove it from your garden and dispose of the plant. There is no chemical treatment for hydrangea mosaic virus. The leaves will turn a darker shade of brown and eventually drop. As the disease progresses, the spots will grow into more angular patches. The centers of the spots will turn light brown and begin to look like a bulls-eye. This could be from rain or irrigating, and will worsen with the humid weather.Īnthracnose begins as small brown spots and will grow quickly, affecting both leaves and flowers. Anthracnose will spread from water droplets splashing onto the plant. Similar to leaf spot (and most fungal diseases for that matter) anthracnose likes warm, wet weather. Anthracnose If not treated, small brown spots eventually turn into larger patches that can cause the leaves to fall off. Fungal diseases can spread from plant to plant, and across different types of plants. They can be difficult to distinguish from both bacterial diseases and viral diseases. Fungal Diseasesįungal diseases arise when a fungus takes hold of your plant. Just like bacterial wilt, there is no known chemical option to treat bacterial leaf spot. So, continue reading to help diagnose the disease impacting your hydrangea and find ways to treat and prevent them! Of course, the best treatment option is disease prevention. But many common diseases can be treated, and successfully eradicated. With some diseases, you may end up just needing to replace the plant altogether. It’s important to note, that not all hydrangea diseases are readily treatable. Once you’ve identified the issue, it’s a matter of treatment, if treatment is an option. So, where do you begin? The very first step in treating any hydrangea disease, is to properly identify the problem. While many symptoms of these diseases look similar, they have very different causes, and some have different treatment options. All three are problematic, and can prevent your hydrangeas from blooming to their fullest potential. These diseases fall under the categories of bacterial diseases, fungal diseases, or viruses. Are you wondering what those brown spots are on your hydrangea leaves? While hydrangeas for the most part are resistant to many pests there are still a few diseases that can affect them.
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