I have a dwarf azalea in a pot we received at my grandfather's funeral. My sister-in-law kept it for about a week and has not passed it on to me to try to save. She says she watered it regularly. The dirt didn't seem to hold water. The leaves are turning brown and falling off to the touch. I have repotted it in better soil. Any suggestions? Do I need to completely cut it back? Is there any hope?