Yesterday I rescued a 4' rhododendron with many brown, dried, wilted leave and dead branches. I think it was planted too deep and/or very thirsty. It has a couple of blooms. I replanted it. Not the best time to move it, I know, but I feared it would die if left until after flowering. Now I'm wondering whether I should give it some food or just leave it be. If I feed it, What should I give it?