I have an avacado tree that I grew from a seed. It did amazingly well last summer and I brought it inside for the winter where it continued to do well. I put it outside a little too early and, I'm pretty sure the plant went into shock. I brought it back inside where it seems to have re-bounded, but their is about 1 inch of the very tip of it that is black and it's not growing new leaves. In the last 6 weeks, a new sprout has started at the base and is about 8 inches tall with new leaves at the top. Can I safely cut the black tip off and how do I get it to grow healthy again? And should I leave the new sprout or cut it off?