I’m In Brentwood TN. My Peonies Have Been Abundant And Amazing For 30 Years. This Summer And Last Summer They Had Powdery Milde

Question

w. I treated my peonies both summers with the water/baking soda/detergent solution. This summer, I pulled off the brown leaves the first week of July leaving very few green (with powdery mildew) leaves in addition to treating with the solution mentioned. See photo. I make about 40 arrangements every year. I don’t want to loose them. What about a vinegar solution? I don’t get why after 28 years without any issues that I am now dealing with powdery mildew. Pam Barnett

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Answer 1

Please to not include your personal information to the public. I have removed it this time.

I believe that this is very old for a Peony! They live for about 10 to 20 years, depending on the species. However, with proper care, they can do what yours have done. It sounds like they are just experiencing the symptoms of old age.

As far as powdery mildew- I think that Neem oil is a really good solution to, both, powdery mildew and insect infestation.

But as far as things go... It is about time for a fresh planting.

Here are some articles that will help:

https://www.gardeningknowhow.com/ornamental/flowers/peony

https://www.gardeningknowhow.com/ornamental/flowers/peony/powdery-mildew-peonies.htm