The hydrangea with… Read more ». The leaves wilted from top down over a two to four week period. Let us know when your hydrangeas have been cured. There are several diseases that it could be. You may have to destroy your plants.… Read more ». Sorry~ I couldn’t figure out how to add the photos on my first comment, so they’re coming separately. Here is an article on how to deal with them: Doing Battle with Japanese Beetles: Tips for Banning Them From Your Garden Now about the flowers. The leaves are all green and pretty healthy. The Thank you for posting a picture! There is also some brown sap running from some cut branches. Are they brown, rust-colored, or white? I have a 75 year old mulberry tree that shades our hot tub and have hydrangeas and hostas surrounding the tree. I received a beautiful hydrangea plant for Easter and the blue blooms were beautiful. That’s great that you were able to save them and have summer blooms. I have fertilized it couple of weeks ago. They don’t have flowers yet, so I’m not sure about the first problem. The leaves of the plants were green and flourishing. Lesions may coalesce into necrotic areas and necrosis may develop on the leaf margins and near the petioles. Flush them from plant surfaces with a forceful spray of water 3 times, once every other day, in the early morning. I have stopped the spread and my the branches / leaves are growing green. Some hydrangeas show red leaf color in fall. Oakleaf hydrangea has 8 to 12-inch-long leaves shaped like oak leaves (Fig. It is very difficult to diagnose, but I have a couple of ideas. They were doing great with abundant nice green leaves and lots of flowers. When you alternate with fungicides that act differently, the fungi are much less likely to develop resistance. Hi Helga, Not sure if it is due to the hot weather and causing the flower to burn. Does it make sense to use the fungicide on the hydrangeas that are planted close to the ailing ones or will it hurt them? Leaf Spots (Cercospora species and Phyllosticta hydrangea), Anthracnose (Colletotrichum gloeosporioides), Bacterial Leaf Spot (Xanthomonas campestris), Read more about identifying and treating anthracnose on hydrangea here, 19 of the Best Cool-Weather Crops for a Productive Fall Garden, 12 Easy Ways to Extend the Harvest Season, read more about growing azaleas in this article, 21 of the Best Heirloom Tomato Varieties for the Garden, 19 Dazzling Delphiniums for Your Flower Beds, The Taste of Summer: How to Plant and Grow Watermelons, Succession Planting: How to Grow Crops for a Continual Harvest, 7 Outstanding Salt Tolerant Shade Perennials, Propagating a New Species: A Man, a Tree, and a Legacy, How to Identify and Treat Pecan Twig Dieback Disease, Prune your plants, so that the insides are open and will not accumulate moisture. Two are available from Amazon (and probably other places, too): Axozystrobin Thiphanate-methyl The other fungicides include paraffinic oil and fenarimol. Thank you so much! Hi Dlyn, I’m so sorry about the transformation of your hydrangea plants. Mouth Protection The Oak Leaf Hydrangeas Windproof Decorative Men Outdoor Sports Adjustable Earloop Reusable Anime Women Winter Birthdays Washable Warmth Skiing Christmas Shopping £4.97 £ 4 . The flowers are too small yet to see if they are attacked, however to me they look as they are. Then go back to watering as usual. I was afraid that might be what has been going on. Did the other spray help at all? I’ve gotten them from three suppliers in the past. Pour liquid fish emulsion into the soil as a drench to fertilize affected shrubs and to repel nematodes. I will continue to treat the hydrangeas and try not to give up. Thank you for posting pictures. That could be why you had problems with your other trees. Two of my hydrangeas are dying. Have you fertilized them recently? From my… Read more », Hi Terence, I am so sorry to hear about your hydrangeas. You can check for that if you carefully lift up some of the soil in the pot and look at the roots. There is a compound called metalaxyl that is sold as Ridomil, Subdue, or Apron that should be available at home improvement stores and should be effective on downy mildew. Thank you for providing pictures! They were doing fine at the beginning,… Read more », Hi Jiyu, I’m so sorry to see the pictures of your poor plants. I have ordered up some Flairform Pythoff to enable me to treat all shrubs nearby. That could indicate that a secondary infection has developed because your tree is weakened. I fertilized the plant a month or so ago with Miracle Gro and it gets watered weekly by my sprinklers. It seems like their stems are stung by an insect which suckles the juice, the stem shrinks and then dies! I take off the bad leaves, but throughout the growing season they keep getting ugly leaves. They are turning black around the edges and have some black spots in the middle. Oakleaf Hydrangea – Problems. It sounds like you want to use a natural treatment. Sterilize your pruning shears before cutting the plants, and plant clean stock in soilless media to avoid the viruses that are transmitted by nematodes in the soil. This is happening on a limelight and a strawberry vanilla hydrangea. Transmission can occur by knives, leaf contact, and insects like aphids. Unfortunately, this kind of fungus develops resistance very quickly. Here are Amanda’s photos of her hydrangeas: Your poor plants! You need to eliminate these with an intense impact of water or with a blend of water and dish cleanser. 1) Foliage discolored, brown, and dry This looks very much like an anthracnose disease to me. I would wait a bit to fertilize. Could it be a virus? Hi Tina! Often it isn’t noticed until the spring. I do not want to stress the plants. Diseases of hydrangea are typically foliar, although root and flowers may also become infected by fungal or viral problems. However, that usually manifests as spots in the middle of the leaves rather than causing dead tissue around the edges of the leaves. Hi thank you for the informative article. But wherever you live, how do you prune them? Actually I did try to move my damaged hydrangeas outside one day in the balcony when it was nice and sunny but the tiny new leafs soon got sunburned, the leafs became pale and quickly died. There are several things you can do if it is anthracnose. I made an error in my post about my hydrangea problems. I think the only thing you can do is prune back the dead limbs, so they don’t get colonized by secondary fungal or bacterial pathogens. I have attached pictures of both. Aff.) I don’t understand. Some people recommend natural remedies like garlic oil, liquid kelp, or hydrogen peroxide (diluted), but you would probably be best served by using… Read more », Hello, thanks for the very informative article. Also, this resistance varies depending where you are in the country. Do you have any idea what it is please? A few things you can do immediately are to prune out the dead and damaged areas and get rid of them out of your garden. There is one other possibility. Even the best gardeners have issues with plants now and then. I potted it with the idea of bringing it into my home this winter (always bring my tree hibiscus in). That makes me think that you are right about a fungal infection. I’m so sorry to hear that. The are maybe half of the leaves not fully developing. Buds and new growth may also be attacked. I’m not sure it is the same disease in all the plants, but it acts the same. To prevent problems in the winter, choosing the right type of hydrangea is essential. The director of UT Gardens Sue Hamilton discusses oak leaf hydrangea. Good luck! Q: I have lost three good-sized oak leaf hydrangeas that were in dappled sun but a fairly wet spot. Thank you for the words of encouragement. This is the first spring I’ve really noticed a white spotting of the leaves. There are several things that could be going on. Hi Amanda, It’s been a while, and I was wondering how your hydrangeas are doing. I will attach some pictures. Spores spread via wind or splashing water to hydrangea leaves. I love oakleaf hydrangeas. Thank you for the informative article! Watering without getting the leaves wet will help to prevent these diseases. 3) Are there round orange spots on the bottom of the brown leaves? I’ll let you know how things work out. Spray affected shrubs thoroughly with a wettable garden sulfur fungicide once or twice at weekly intervals starting as soon as the whitish coating appears. I hope you can offer some advice concerning my hydrangeas. My hydrangea leaves are getting folded and looks different in colour. Hydrangeas are woody shrubs with bright beautiful heads of flowers. From what I understand, there isn’t much you can do but prune back the dead limbs. Infested plants look sickly, wilted, stunted, and have yellowed or bronzed foliage. That is awesome that you removed the debris! Treating them with mancozeb should help protect them from the spread of anthracnose. North America, where winters are generally milder, the buds that were formed last year were, no doubt, killed by our frigid arctic temperatures. Flower buds form long, cone-shaped clusters that crown summer landscapes with color. Water your plants at the bottom, so the tops will not get wet. I even have a few blooms too. Or are they crinkled? In the Autumn (Fall) we pruned the branches back by 2/3rds. One way to control this disease is to apply a fungicide as soon as you discover it. That is effective on many plants. Hi Nancy, I’m sorry to hear that. It looks like a nasty case of powdery mildew, which is usually resistant to fungicides. Powdery mildew is most likely to be a problem on hydrangeas when the days are warm and the nights cool. Types of Oakleaf Hydrangeas. You should definitely remove the diseased tissues. That disease would definitely call for fungicides. That sounds awful. We have two limelight hydrangea trees that are three years old. I have already experienced one diseased plant from them that I… Read more », Dear Shannon, I’m so sorry that your hydrangeas came with problems! That disease also spreads to the leaves, and it looks like that is the case from your photos. I think I can figure out what is going on from your description, but a picture would help immensely. Mulch shrubs to prevent rain from splashing fungal spores up onto leaves. Hi! Other people may experience issues due to the muscle issue myofascial pain, joint damage or trauma to the area. It’s been cool here and just a storm the past couple weeks don’t seem to be conducive to most diseases I deal with during… Read more », Dear Gary, Wow! Thank you! You could start with neem oil, which is readily available. I knew last year there was a problem with one of them and I treated it with a fungicide. As the lesions get larger, the leaves can turn yellow and fall off the plant. My family has two oak leaf hydrangeas that have yellow spots and are not doing very well. Should I continue or discontinue? 70% rubbing alcohol or 10% bleach. Hi Aine, Your poor plant! subsp. Lesions may coalesce into necrotic areas and necrosis may develop on the leaf margins and near the petioles. They look like little colored balls. Dear Julie, I can’t be sure, but one possibility is that the flowers later in the season are reacting to the hot midday to afternoon sun. Fungal infection, but it looks to me, but I suspect it might a... Worse on the veins do look purple winter, choosing the right time each.! The spots problems with oak leaf hydrangeas eventually it always comes back the infection doesn ’ t work, I m. 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