I can't help you with cold tolerance , but can confirm that it will be described as a Caladium in the near future . Damn and I was so sure it was a Xanthosoma ! If they grew to a good size there would be many offsets on the main tuber , hopefully some will remain . Dig them up in future .

Mine are just starting to come ou so be patient Hightider

I dug up the only Hilo I could find this morning and it's a bunch of tubers with roots. Some are mushy but some seem OK. Since I'm really not familiar with tubers, can anyone tell me what to do next to see if I can save this plant?
BTW, my 2 Black Magics are just now emerging but I've read they can be pretty cold hardy--unlike the Hilos.