Overwintering Carrots in a Window Box

Carrots are exceptionally cold-hardy, but growing them in a shallow window box on a deck adds risk. Containers freeze faster and deeper than ground soil. In a garden bed or large pot, carrots usually survive winter well if loosely mulched with pine straw or leaves—not covered tightly.

For your window box, consider moving it to a sheltered spot against the house and insulating the sides, or harvest the carrots now and enjoy them fresh.