It is possible to use your Red Wing Crock as planter outside with soil as long as it has good drainage. In the bottom of the crock we would recommend either 4 inches of sand and stone on the bottom for drainage or simply place another pot in the crock so water can drain from it into the crock. 

As soon as the weather in your area get to be 32 degrees or colder, you need to move the crock inside (not in an unheated garage either).   If the crock is not move there is a risk of damage from the water or moist soil. The cold temperature will
freeze the the two and both the water and soil will expand and crack the crock.