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"?
Lichen is normally not considered a pathogenic or parasitic condition.