Holly Bushes

White Powder on Holly Branches

Rebhanb750 added on September 12, 2016 | Answered

There is white powdery stuff growing up the branches on my holly. Is this a fungus?

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Certified GKH Gardening Expert
Answered on September 12, 2016

Yes, this is most likely a fungus called powdery mildew. It is common and can affect holly shrubs, but will typically not seriously harm them. A spray of whole milk diluted in water has been shown to help kill powdery mildew fungus. These articles discuss other ways to treat and prevent powdery mildew:


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