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Hyacinth Plant

Q.Mildew on roses

Zone Vancovuer, British Columbia | maylin127 added on August 29, 2017 | Answered

How do I get rid of mildew on the leaves of roses?

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Answered on September 1, 2017

Powdery mildew is caused by insufficient water during hot and dry weather and by poor air circulation. There are commercial products for treating mildew on plants. Spray in the early morning once a week until the mildew is gone. There are numerous DIY formulations with baking soda, dish soap, etc but I can't vouch for their effectiveness. Here is the American Rose Society page on powdery mildew:

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