Thanks for all the great information. Holly am I remembering correctly that you're in z6b? I ask because of the length of time you withhold water. I won't be able to set these plants out until mid May so all told that's 6 1/2 months. How long for you Holly?
The air here is definitely very dry in the house during winter Zig. I often forget that. One of the unfortunate side affects of a hot air system. Pending how long Holly says she withholds water, a light occasional watering might be the best solution. I killed a mislabeled running Colocasia last winter by digging and storing the tubers dry, like my C. esculenta. The tubers were smaller and they didn't survive.