The Garden Bug: Pots and Plants in Winter

By Brenda Weaver

Your outdoor pots and their plants need protection from the cold. Large wooden or concrete planters can be left in place and their plants covered with straw or mulch. Clay, ceramic or glazed pottery may crack when it's cold out, so wrap them with bubble wrap. With smaller containers, you can group them and wrap them all up together, or move them inside. Pots and their plants can also be buried in the ground and covered with soil or mulch.

Source: extension.psu.edu