I just checked my dahlias that I wrapped in saran. They look just like I just put them up for storage. I have the saran clumps in paper bags and the bags in a dark bin.
Originally I had the bin in the garage. But it was getting into the 20s in there. I moved them to the pump room in the basement. I thought it would be perfect temp but my darn husband opened the heat vent in there! Grrrrr. I can't find a good place to store them!