My peony plants have powdery mildew. What should I do?
by
Miira
+2
They are finished blooming. Do I cut them down? Spray them? Leave them alone?
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Use a spray or mildew powder.
I've controlled mine by cutting them down and removing all of the stems and leaves from the area. clean up the ground around them real good. Then to get ready for next year I spray down the area with a baking soda mixture of 1 tablespoon baking soda, 1/2 teaspoon dishwashing liquid (I prefer the original blue Dawn) and a gallon of water. The baking soda changes the pH of the fungus and kills it off.
Copper Sulfate fungicide used by organic gardeners... https://www.google.com/search?client=opera&hs=AFe&q=copper+sulfate+fungicide+organic&oq=copper+&gs_l=psy-ab.1.0.35i39k1j0i20k1j0i131k1j0.13315.16578.0.19137.12.10.0.0.0.0.316.1456.2j7j0j1.10.0....0...1.1.64.psy-ab..3.9.1368.6..46j0i67k1j0i46k1.nngr6Mi9704
Wow., this what I have been looking for. Thanks.
also make sure for the future the drainege is good, you can use epsom salts to help with that