My arbutus unedo â€˜Compactaâ€™ (6 yrs old) has not come through this winter as well as it has in previous years. The snow & freezing temps have left much of the foliage blackened. The tree is about 6' tall. I wonder how well it takes to pruning? I've only pruned very lightly in the past to shape the tree, but now I am thinking about taking more severe measures to take out the damaged foliage. Will it leaf out from the very woody parts of the branches? Is it too early? Thanks for any info.