Store it underground. In Canada, the temperatures dip well below -20C regularly, but not 10 feet underground they don't. It takes months of sub-zero above-gro

Store it underground. In Canada, the temperatures dip well below -20C regularly, but not 10 feet underground they don't. It takes months of sub-zero above-ground temperatures to even break the freezing mark and crack pipes that are 6 feet underground.