Answer: It sounds as though your Rose of Sharon has been terribly stressed by the excessive rainfall. With any luck it will recover from this and leaf out again. Until then, all I can suggest is to take a wait and see attitude. It may be that you will need to prune your shrub back once you see where the new growth is coming from. I imagine that it will be lower down on the plant rather than on the upper parts of the branches. Just be patient with your plant and hope for the best.
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