My hydrangea is getting white stuff on the leaves. What is this and how do I get rid of it?
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They could be newly bugs or spider mites. Use insecticidal soap.
I have seen this on several plants in our organic garden. Normally I'll see these small white flies on the leaves. I just spray the plant with some mild soap and water to clean the plant.
Can you post a photo of what you are seeing?
It might help figure it out.
It could be powdery mildew, bugs...
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