Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 21, 2011
Neem oil can sometimes be effective. These articles will help: https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-powdery-mildew.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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00roseman
Answered on May 22, 2011
Great advice Nikki. Spraying them ASAP with a product such as Green Cure is very important. The sooner the fungus is killed the better before it weakens the rose too much.
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