Looks like winter is over.

This is my third year with musa bajoo, each spring I uncover a pile of mush and in a few weeks some sprouts.
Is there a good time to uncover my bananas? I mean, should average day time highs be in the 40's, 50's? Or should I be more concerned with overnight lows?
I tried something different last fall to overwinter my naners. If it was successful, I'll share pix, if not back to the drawing board.
