Hello! I have a 2 year old miniature rose (bought from Kroger, it was only 5 inches tall) that is about 3 feet tall now. It was doing very well until my cat knocked the potted rose over. Since then it has been struggling. The leaves continue to have their tips dry up until the entire leaf is dry. New growth has slowed and the newest buds have discoloration. It also started to grow new stems, but their tips are turning brown and black. What can I do to help it?