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Blackened geranium petals

I have some usually healthy and easy to care for red geraniums which have suddenly developed black blotches on their petals. Can any one tell me what this could be and how to remedy it? Thank you.

Posts

  • yorkshireroseyorkshirerose North YorkshirePosts: 574
    Have you a photo, please?
    A gardener's work is never at an end  - (John Evelyn 1620-1706)
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