I don't know about a fridge, but I stored a fairly large orinoco corm in a plastic bag inside the crawlspace of my house. When I retrieved it, it was a little slimy. I cleaned it up, cut off some mushy parts, and put it in soil; it grew just fine. I've never monitored the temperature in the crawlspace, but I would guess the temps range from upper 30'sF to 50's during a zone 7 winter. A fridge runs around 39F. If you have an extra banana plant that you don't mind sacrificing, you ought to try the refrigerator thing. I would wrap the corm up in some type of plastic. Do NOT add any extra moisture to the plastic container. The corm should have plenty and you don't want it to rot. Place it in the vegetable crisper since its slightly less cool than the upper portion of the fridge. You may want to check on it once or twice a month. If it shows signs of decay, you should clean it up and pot it immediately.
December 2011
July 2012