Answer: Jaboticaba trees are hardy only to about 29F degrees so it sounds as though yours is suffering from winter die back. You may need to prune to remove the dead branches. Pruning will encourage healthy new growth. Prune off anything obviously dead and then cut back most of the branches to force new growth. If your tree has an established root system the pruning will prompt new growth. If the roots are also winter damaged, they may not have the energy to develop new growth. I think it's worth a try. If you don't prune the tree will just languish. If you do prune you may shock it into growth. Let's hope for the best!
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