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apple tree #900576

Asked May 08, 2025, 9:56 AM EDT

could you tell me what this on my apple tree

Carlton County Minnesota

Expert Response

Thanks for the question. Your apple tree has lichen growing on it. It is not at all harmful. In fact lichens only grow where there is no air pollution. No need to remove them or treat them with anything. If you are interested, here is a link for more information:  https://extension.umn.edu/trees-and-shrubs/non-harmful-tree-conditions

Paul -Tree Care Advisor volunteer

An Ask Extension Expert Replied May 08, 2025, 10:56 PM EDT

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