...moving it to a mound of Miracle Grow plant soil tomorrow. It's not like it can get any worse. Only maybe an inch of the plant is still green--the rest has turned black or greyish-green. I'm hoping that giving that one section some extra nourishment, maybe it'll survive.

Thanks for the suggestions, guys. I think maybe it was already too far gone before I asked for input. At least the other plants seem to be doing okay.