Azalea Plants
Q.

Identify Azalea Disease

Anonymous added on March 8, 2011 | Answered

I 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.

A.
A.Answers to this queston: Add Answer
Nikki
Certified GKH Gardening Expert
Answered on March 9, 2011

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

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