Time for another update: the leaf that popped up was really weak and broke off another week later. But, after that, a pup popped up really strong, and another leaf began growing at the main plant. So after letting it sit for two more weeks, I decided to put it in the ground. Glad I did, as it is apparently root bound in the pot (so I'm going to have to get something bigger than a 22 gal pot in the winter. Fabric? Worry about it later).
Had some dying trees and their roots removed from a couple of great sunlight/high drainage spots, so I put the banana in one with it's normal mix of soil/manure/sand like it had in the pot.
Here's some photos. If you see anything that I should/need to do to it in its new summer home, please let me know.
First shot as I pulled it out of its winter pot. Definitely rooted. Roots are healthy though.
Better shot of it out of the pot. The larger leaves are the pup. The smaller one that is in a hard shell is the main, original plant.
The roots and the hard shell the main plant is leafing out of.
Transplanted in the ground in its new summer home
Better shot of it in the ground. Seems to be doing well. Little bit of shock in the pup, but I'm expecting it to bounce back by tomorrow. I have to occasionally move the pup leaves a bit so that it doesn't cast a shadow over the main plant.
That's it. If you have any advice on my pet Gros Michel, I'd appreciate it. I am enjoying growing it.