Here's how to overwinter Colocasia: Before the First Frost: Before the first expected frost, dig up the Colocasia tubers with a shovel, being careful not to damage them. Clean and Dry: Gently remove excess soil and let the tubers dry for a day or two in a cool, dry place. Store in Peat Moss or Sawdust: Place the tubers in a box or container filled with slightly moist peat moss or sawdust. Ensure that the tubers are not touching each other to prevent rot. Cool and Dark Place: Store the container in a cool, dark place where temperatures stay between 50-60°F (10-15°C). Basements often work well for this purpose. Check Periodically: Throughout the winter, check the tubers occasionally for signs of rot or shriveling. If any tubers show signs of decay, remove them to prevent the spread to other tubers. Replant in Spring: When the danger of frost has passed in the spring, you can replant the tubers in the garden or pots.