Growth on Azalea Bark
Have a number of azaleas, most are doing great but a few have this pale blue-green, flaky looking growth on the bark, like you sometimes see on really old plants but these are fairly young. What is it and will it infect my other plants?
Certified GKH Gardening Expert
This is lichen, which is not harmful to the plants. This article will explain more about them: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm