Rough year for bananas

It's been a rough year for my bananas. The winter of 2013 killed a lot of my banana supply. The bananas that remain are small. I've just about given up on my bananas. My dwarf Cavendish bananas flower and throw out small fingers.however, I can't get the fingers to mature. It seems like I'm wasting my time and a lot of space.The bananas that I have remaining are: dwarf Cavendish, super dwarf Cavendish, and truly tiny.