What do you think? If you provide a leaf, they might be able to help diagnose what organism is responsible. I put my hose at the base of each plant and let it trickle on the root ball for about 30 minutes. Now the outside temperature have gone up around 50-80 degrees, is that good for hydrangeas? Botrytis Blight. How about the leaf curl? That kind of leaf distortion is usually from a viral infection or an insect infestation. The Spring brought early growth with one plant doing better than the other, both started leaf production and is still fine but the other plant leaves have withered as though lacking water, both plants have been watered the same, usually once a… Read more », Hi Alan, I’m so sorry to hear that one of your hydrangeas is afflicted with something! Disinfect your pruning shears with 70% rubbing alcohol or 10% bleach. This year I took a lot of the deadwood off early in spring. Hi Helga, It’s not responding to any of the fungicides I try, I can’t seem to get them to upload, or delete the comments that uploaded without the pics. Hi There! It destroys the roots, so the plants can’t take up water and wither away. I also wonder if your hydrangea could be infested with scale insects. Plus, fungi can develop resistance if you use the same chemical over time. However, the hydrangea is not doing well. The first signs of rust disease are brown to orange pustules on the underside of leaves and yellow spots on the upper side. Helga George, PhD. I will try that. Fifteen different viruses afflict hydrangeas! Botrytis blight, sometimes also known as gray mold, is caused by the fungus Botrytis cinerea. Most people buy hydrangeas when they are blooming, but spring or fall is the best time to set them out. Hi Aine, Your poor plant! Be sure and disinfect your pruning shears periodically in 70% rubbing alcohol or diluted 10% bleach… Read more ». Hydrangea is susceptible to several other diseases. I am in zone 7 (East Texas) and we have sandy soil. Any ideas? However by that time they already got some leaf and bud damage, so they… Read more », Hi Jiyu! Thank you so much for providing the pictures and sharing your good news. There are some commercial products that contain it, but I suspect they have other chemicals to modify the solution. , Hi Wende, I’m so sorry that your long-term hydrangea has an infection. The leaves that are misshapen make me think that the problem might be a virus. Now that she lives near Santa Barbara, California, she is delighted that many of these grow right outside! Be sure to disinfect your pruning shears using 10% bleach or 70% rubbing alcohol. They are turning black around the edges and have some black spots in the middle. Hi Helga, Fortunately, both diseases can be treated by the same fungicides: Chlorothalonil Thiophanate methyl Mycyclobutanil Sanitation can also help if… Read more ». They looked fine at first but since they’ve been planted (about 2 weeks) the leaves have started looking awful. Spots are normal on some hydrangea stems, but if they are new, that is definitely bad. 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. The symptoms sound like the plant might have Phytophthora root rot – a hideous disease. I forgot to add that I am growing the Hydrangea Paniculata Pillow Talk. Every year I have problems with oak leaf hydrangeas. Look for little webs on the leaves. I don’t know if it’s host specific for hydrangea. Thank you! Thank you for providing pictures! That disease also spreads to the leaves, and it looks like that is the case from your photos. If you have a persistent problem, you may need to use fungicides. Here is more about what we do. How much hydrogen peroxide should be used? I think there are two separate things going on. Three weeks ago, I transplanted a few hydrangea paniculata pillow talk. Did the other spray help at all? Their symptoms are wilted leaves on hydrangeas. Watering from the bottom will help keep the disease from spreading. Last year, I started noticing the brown spotting. From my… Read more », Hi Terence, I am so sorry to hear about your hydrangeas. If you know that rust is likely to be a problem, you can grow the cultivar ‘Frosty,’ which is resistant to this disease. Why does this happen? Using soaker hoses rather than sprinklers or spray nozzles can help. I hope this is not causing it to be a water from top approach. Lightly colored in the future up yet systems of plant defense the infested parts need to be a good to... Know… Read more » the plant, so you don ’ t be sure and disinfect your pruning using! Planted one in my house on stems and the flowers to turn the flowers if they… Read more.... Please kindly look again if it ’ s probably powdery mildew to me it... 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