I have planted an Abyssinian Banana (Musa Ensete Maurelii) in my Lower Mainland garden. In one growing season it has grown to 10 feet in height and 12" in diameter. How can I overwinter this? Do I need to dig it up and store it in my garage? If so, do I cut it back completely? And when should I do this? Or can I leave it in the ground and protect it with insulation and plastic? It's a fabulous looking plant and I'd really like to keep it going.