Reduce watering frequency when the foliage begins to turn brown in the fall.
Cut the stems to 6 inches tall after the first frost. Carefully dig up the corm with a spade or hand trowel.
Place the elephant ear corm in an area that remains near 60 degrees F for three weeks, to dry.
Place a 2-inch layer of peat moss or sawdust in a small box. Cut the foliage from the corm, brush the soil away and place it in the box. Cover it with 3 inches of the material.
Place the box in a location in which the temperature will remain between 45 and 55 degrees F for the winter.
Check the corm periodically over the winter. If it looks as if it has shriveled, add a few drops of moisture to the peat moss or sawdust.
Replant the elephant ear corm in the spring.