All the plants in the trade from the years 2012/2013 had a fatal flaw and died mid season, it's unclear why, and not well documented, I don't know if the plants from 2014 were affected, or if the 2015 crop will be affected!
My only source for these seems to be tainted, plants grow fine, but do not store, the bulbs are hollow and rot from inside out
This is a very hardy and durable plant, these issues are not common for this species.