lichen on an old rose of sharon

I have a rose of Sharon which was a small tree (not a bush) when I moved in to my home 26 years ago. it has been pruned back many times including a hard prune last year. in (hard) pruning this year I noticed there is lichen growing on the trunk and branches. also there seems to be some spots on some of the leaves. what should I do to save my beloved “tree”?

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1 Comment To "lichen on an old rose of sharon"

#1 Comment By drtreelove On 10/26/2018 @ 7:33 am

Lichen is normally not considered a pathogenic or parasitic condition.

https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm ^[1]

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