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PM on KnockOut Roses

18 years ago

Hi All~

I am having some powdery mildew issues-still!

I planted three pink double KO roses earlier this year. It seems that they got PM a few weeks after they were in the ground. I am going to guess they were possibly infected from my echinaecia. My question is should I continue to spray the roses or will the cooler temps knock a dent in the PM on it's own?

Thanks for your responses!

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