How long will corm vegetables last in a refrigerator and should they be wrapped? How long can corm vegetables - celeriac (celery root), turnips, and swedes (rutabagas) - be kept in a refrigerator? And should they be wrapped? I usually buy them wrapped in sealed plastic. If aiming to store them for as long as possible, should I leave it on, replace it with cloth or greaseproof paper, or perhaps store the vegetables unwrapped?
how long is long ? 

They are fine for couple of weeks if stored in a cool place with good amount of humidity.

"These are dependent on ideal storage conditions of 32 to 40 degrees Fahrenheit and 95-percent humidity."