That can be rust – another fungus. The leaves are always green and healthy – it’s just the blooms during the 2nd bloom period that are a light brownish color. The 1st blooming in early June is always gorgeous! Pick up any spotty leaves that have fallen and throw them out with the trash. Going to order other fungicide you suggested and have it standing by. My dad tried a broad spectrum fungicide and that has not helped them bounce back. I treated with an organic anti-fungal spray that seemed to help, but I noticed I had to use it more often than the every two weeks recommended on the bottle. . Prevention is the key in these cases. Is that the type you have? Hydrangea macrophylla, also known as big leaf hydrangea, is an economically valuable ornamental garden plant.From 2016 to 2018, a high incidence of leaf spot disease of hydrangea occurred in Hunan Province of China. Thank you for the pretty picture! The fungus spreads through spores that grow on fallen hydrangea leaves. We are so glad that you found the article informative! These plants are 8 yrs old. I’ve only had one variety in the past that has not. Use drip irrigation or soaker hoses to water hydrangeas. Newly hatched scales (crawlers) are less than 1mm long and are pale yellow. Hydrangea macrophylla Which Hydrangea cultivars work best for you Fungicide sprays LEAF SPOTS WARNING! The plants themselves look fine. The first is try and flush the excess fertilizer out of the soil. There is one other possibility. Unfortunately, it’s difficult to diagnose from a picture because several pathogens produce spots that look similar. Unfortunately, I can’t find a… Read more », Dr George. It definitely looks like an infection. However, this fungus usually produces colored fruiting structures on the infected branches. It was a great thing to try, but fungi develop resistance if the same chemical is used for too long – even natural ones. Every year I have problems with oak leaf hydrangeas. This disease causes unsightly spots on hydrangea leaves and contributes to the defoliation of plants. I do not see any insects or borers or fungus on them… Sevin dust didn’t help. They spots appear to have a hint of red and they start from the leaf tips. Also, I have not fertilized the soil. A reader's hydrangea seems to have caught a disease. If so, now is the time to treat them.… Read more », Hi Helga, I posted last month about my endless summer hydrangeas possibly having anthracnose. Predictably, leaf spot fungus covers climbing hydrangea leaves and flowers with ugly brown or gray spots. Maybe Endless Summer (not sure): spring began well but leaves are again discolored, brown and dry. We have had it for many years and it was a healthy plant. I sprayed with an organic insecticide/miticide and cut back most leggy stems. Thanks! Hi Rosemary, I’m so sorry to hear that. Best offers for your Garden - ----- Hydrangea Plant Diseases. However, the second blooming in late summer is really ugly. Hi Helga, Sanitizing your pruning tools will help to prevent the spread of this disease. It can be treated by a variety of cultural moves as well as spraying a fungicide. This is the time of year… Read more ». That disease also spreads to the leaves, and it looks like that is the case from your photos. The first indication that your hydrangea is infected with Colletotrichum gloeosporioides will be brown spots on the leaves. If you provide a leaf, they might be able to help diagnose what organism is responsible. It is common from summer through fall. I potted it with the idea of bringing it into my home this winter (always bring my tree hibiscus in). That’s a sunken lesion in the bark. They look like little colored balls. 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. There are several things that could be going on. Leaf spots caused by a variety of fungi can occur on hydrangea. Elephant ears are often grown for their huge, robust foliage. Does it make sense to use the fungicide on the hydrangeas that are planted close to the ailing ones or will it hurt them? Climbing hydrangea prefer to be grown in partial shade. Plant Pathologist, Brian McGuinness shows what bacterial leaf spot look like on hydrangea. I’m glad that you are bringing a company in. May 30, 2017 - Explore sue andrepont's board "Hydrangea Disease" on Pinterest. Control insects, since they spread many of these diseases. I do not want to stress the plants. The most common time for them to do so is in the summer months. In addition to the usual white, powdery fungal growth on the leaf surfaces, yellow or purple leaf blotches might be present. That would make it easier to diagnose what is causing the disease. 1) Foliage discolored, brown, and dry This looks very much like an anthracnose disease to me. Had to heavily prune the other day. Thank you!! I planted one in my personal garden and it ended up being fine. That will help the roots by keeping them cool and maintaining moisture in the soil. The leaves/blossoms were all dry and dead, but I gave them a chance to recover. It is a very large, mature hydrangea bush that I … It looks like the rain and humid weather unleashed an attack of fungi on them. If that doesn’t work, I would move onto a more aggressive insecticide, such as pyrethroids. If sprinklers are used, always water early in the morning to encourage rapid leaf drying. Hi Susanna, I’m sorry that your hydrangea has an infection. Is there anyway that you can reduce the size of them and try again? I have two pink hydrangea bushes that must be well over 20 years old, but some stems are black with white spots. As the watering is done at the roots with an irrigation system throughout the day. If they are purple, that could be Cercospora leaf blight. However, fungi can develop resistance pretty quickly, so rotate different fungicides. Thank you for providing pictures! But the leaves are starting to turn brown. Normally, it would have taken me weeks to learn what it was and how to treat. These particular plants are about 6 years old. The first symptoms are orange pustules on the bottoms of the hydrangea leaves and yellow spots on top. Treat your pruning shears with bleach as you prune, so you don’t accidentally spread any disease. Cool weather favors many types of fungal infection, but I’m not sure if that is the case with anthracnose. Powdery Mildew. However, they got frost damage last winter from a freezing night because I forgot to bring them inside. It looks like a fungal infection to me, which could explain why the sevin didn’t help. I hope you are enjoying the summer. It is still small and today I went in the backyard where it is and noticed spots on many of the leaves as well as several leaves having large sections missing. Try that and see if it works. My hydrangea leaves are getting folded and looks different in colour. You should probably apply a… Read more ». Are there brown, sunken areas around the puncture wounds? Treating them with mancozeb should help protect them from the spread of anthracnose. Good luck! That is a good way to tell whether the spots are due to a fungal rust infection or to something else. In addition, infected flower parts can fall on the leaves and infect them. I have attached pictures of both. It afflicts macrophyllas the most seriously, although it will attack some of the others. You should also prune back the infected parts of the leaves and flowers. Hi Julie, I’m sorry that your summer blooms look so ugly. If you are growing your hydrangeas in containers, you can avoid tomato ringspot virus by using a soil mix that is free of nematodes. They feel a little spongy. Fertilizing hydrangeas can cause the leaves to brown on hydrangeas. I just noticed another person describing the same problem below. Powdery mildew first appears as small white spots on the upper part of the leaves. So we did not get the early May bloom.… Read more ». Along with most of the leaf spot diseases, it begins as small dark-colored specks on the leaves. 2) Is there grey fuzzy mold over the brown flowers? Powdery mildew, a fungal disease, is a common disease for all but the oakleaf hydrangea (Hydrangea quercifolia). When the rainy time ceases, new growth shouldn’t have the spots. These symptoms usually appear late in the growing season. If needed, protectant fungicides can be applied prior to infection. If you rub against the spots, do your hands turn rust colored? The way the spots have a clear zone in the middle strongly suggests that they are infected by a fungus called Cercospora. A few of the leaves have also turned whitish in spots. I have hydrangea that I planted this spring forever bloom I think well the one planted on the east/south end of the house are really looking bad the leaves are stunted looking and have brown spots with white specks in center of the brown spots also it seems to be a small hole develop in the brown spots then the end of the leaves are browning and curling what have I done It starts out with lesions that are angular shaped and dark brown to purple, and it also starts from the bottom of the plant. It may be too late to save your plants. Hi, Helga! Thank you for posting a picture! I am glad to see that there is some growth in the center of the plant. That can often cause some of the upper branches to die. Different chemicals are required to kill it. The spray you provided contains neem oil, a natural fungicide, but it might not be strong enough to kill this kind of fungus. It might not be anything that you did wrong. Hydrangea > Leaves > Spots or blotches on leaves. They don’t have flowers yet, so I’m not sure about the first problem. Get 10% off at Thompson & Morgan and save on seasonal specials. Also, I was using Neem Oil mixed with water and dish soap mix every 7 to 10 days for preventive. Would it be possible to post a picture? In the Autumn (Fall) we pruned the branches back by 2/3rds. Space them properly, and prune branches that are closely spaced. Hi Joel, I’m so sorry about your hydrangeas. This year, I have been doing the same about once a week, but now I’m also noticing browning around the edges of leaves. Maybe Helga can help with this hydrangea problem we are having now for the second year. Soft Scales. The RHS has a list of plants resistant and susceptible to honey fungus. Feed: Miracle-Gro. 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