There seems to be 2 main recommended methods to over winter tropical lilies in regions were ponds freeze: remove tubers and store them in a cool place or maintain the pot of lilies inside in water at above 60 F with grow-lights. My attached garage never goes below about 45, even when outside is the coldest it gets here in southern CT (about 0F), so would the lilies be OK if left to over-winter in a tub of water in the garage - essentially going dormant in their container without the water freezing? I could oxygenate the water to keep it from getting cloudy and smelly.