I bought a large banana plant early this year. The previous owner recommended that we wait till the outdoor temperature at a minimum 5°C / 41°F to transfer to plant in order to minimize the shock to its root and repotting, so we waited till early March.

The owner sawed the root out from the previous planter and we moved it back to mine, and I got a 25" wide 20" tall pot for the plant. Everything was peachy. A couple of weeks later, the leaves started falling. So we cut the broken leaves off.

It was downhill from there. Leaves kept on breaking/falling and a sucker keeps sprouting. I would try and dig out the soil around the sucker and cut it from as deep as I could. But it's no use; it keeps popping out every week.

Now, there are 2 leaves left and they're browning.

Is there hope left?

I read a bunch of articles and here are what I know:
1. Definitely not too much water. Top 2" soil is quite dry and going deeper it's moist.
2. It's facing the same side (south west) by the window so it should get the same sunlight as before.
3. No fertilizer yet but when I repotted it I chopped up broken leaves and mixed in with the soil, as I was told that's the best plant food for banana trees.
4. Cut off some of the thick brown layers on its trunk.

I feel pretty hopeless.