By Mary H. Dyer, Master Naturalist and Master Gardener, www.summitspringsgardenwriting.com My hibiscus has white fungus; what should I do? White powdery mildew on hibiscus is a common problem that usually won't kill the plant, but the powdery substance can definitely detract from its lush appearance. If you own a hibiscus with powdery mildew, all is not lost. Read on to find out more. Symptoms of Hibiscus with Powdery Mildew Powdery mildew begins as white spots that turn gray or tan as the fungus grows and covers more of the foliage. The fungus causes stunted growth and in severe cases, the leaves may wither and fall off the plant. Powdery Mildew Treatment on Hibiscus If a hibiscus has white fungus, it's important to tackle the problem as soon as possible; once the problem is established, it becomes more difficult to control. There are several possible treatments, but chemical fungicides, which are
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