I need some suggestions. I have been nursing this zebra plant back to help. I had some root rot issues, I have trimmed the plant, cleaned up the roots, fresh potting soil. I finally have a little new growth but still have one leaf that is old and dying off. My question is: is the pot to big? Should I cut the stem and propagate? Trim the leaf?Or leave it for longer now that’s it seems to be doing better.