The fact that new growth is emerging is a good sign. Keep the soil moist and give it some time. There is not much time to fall and winter so I would not fertilize it now. Wait until early spring to fertilize. The leaves will darken some in time but next year's leaves will be naturally green. I think the tree will be fine but it needs to get those leaves on out and give them time to do some carbohydrate production to replenish the lost reserves before a cold snap causes them to fall.
Thanks for the question. Please stop in again soon!
Q&A Library Searching Tips