I have an unknown variety of banana growing. At first it was in a pot and It grew extremely rapidly at first and was lush and green. When it outgrew it's 15 gallon pot I put it in the ground and it hasn't grown hardly at all since. Its in well drained soil although i probably did water it too much over the winter. The leaves are yellowish, the stem is awfully brown looking and soft. If I peel off a layer it is very wet looking in there but not in a good way.

Strangely, it just flowered for the first time and set a few bananas out. It's down to two or three piddly leaves though.

What should I do to try to get this thing going again, or is it permanently infected with some kind of rot?