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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have noted a light bluish-green, algae-type deposit on the branches of my very mature azaleas in southern New Jersey. I planted these over 30 years ago and do not want to lose these specimens.
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[1] https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
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1 Comment To "Identify Azalea Disease"
#1 Comment By Nikki On 03/09/2011 @ 8:03 am
It actually sounds like they have developed a 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 [1]