Q.Purple Leaf Maple
There are patches of grey/white on the bark of my Norwegian maple (Crimson King). Is it likely to be a fungal infection or mildew? It will not wash off easily but can be scraped off with nail.
Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on March 11, 2011
It sounds like the plant just has a lichen. It is not harmful to the plant. Here is more information:
https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
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