I live in south Florida and have a lime tree that is 12 yrs. old. We have had 2 bad cold spells this winter. My tree is now half dead on one side and other side has some leaves and also has limes. I have been pruning a little to get the dead stuff off. Help, this tree survived hurricane Wilma! Is it dying or will it come back if I can prune it all the way down? Thank you.