My yellow patio rose plant has got a white powdery coating on leaves. What can I do?
Certified GKH Gardening Expert
Neem oil can sometimes be effective. These articles will help: https://www.gardeningknowhow.com/ornamental/flowers/roses/roses-powdery-mildew.htm
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.