I live in Colorado and the weather here in the spring is like a yoyo. Early spring we had some warm weather and my tree started budding and then we had a cold front come in. Went down to digits for a few days. All the buds froze and fell off. Here it is now late spring and the tree has leaves growing on one side but not the other. Has this episode killed half of my tree or is there something I can do to revitalize the tree?