I just cut down all my bananas for the winter the day after thanksgiving. I used a slightly different method to protect my bananas this year.
Step 1: I cut back the p-stems to about a foot high.
Step 2: spray p-stems with fungicide.
Step 3: wrap p-stems with quilt batting (use safety pins to keep in place)
Step 4: Use large styrofoam Rose Kones and stuff with dry leaves, then place on over the p-stems. put some mulch or dit around the rose kone.
Step 5: Placed large plastic bages of leaves around the rose cones (I used 4 bags per plant)
Step 6: Cover with more leaves
Step 7: cover with plastic. I used landscape staples and bricks to secure the plastic to the ground.
This seemed easier than building a cage around each plant.
Jeremy
St Louis MO