I am making mulch from the plantains.
The truth is that I cannot put soft stems or leaves into the chipper/shredder, and no sticks wider than 1 1/2 inches. Today I chopped up soft stems, pealed the tattered leaf sides off, and placed both of these kinds of materials into the compost. I am finding that I have more green compost than I thought I would have.
I chipped the dry stems, and will use this as mulch, along with some of the hand chopped wet stems.