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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have Peony with powdery mildew – I plan to follow the homemade remedy spraying with the blend of baking soda, dishwashing liquid and horticultural oil. My question is: will using food based pure canola oil be an effective substitute for horticultural oil?
Thank you, Denise
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1 Comment To "Powdery Mildew"
#1 Comment By shelley On 05/29/2015 @ 1:45 am
The recipe for the homemade solution is below. You can use canola oil instead of horticultural oil both are equally as effective.
Homemade remedy: Mix together a tablespoon each of baking soda, horticultural oil (or canola), and liquid dish soap (without bleach) with a gallon of water.
For more information on peonies and powdery mildew, please visit the following link:
https://www.gardeningknowhow.com/ornamental/flowers/peony/powdery-mildew-peonies.htm [1]