I see several messages about pulling caladiums on GardenWeb even though I don't grow them myself. Use the search window and just type "caladiums." My neighbors grow them in masses and will be pulling them in a few weeks. With bulbs, tubers, things like that, you want them to grow as long as possible.

I hope this helps! Maureen

Even here in Florida, Cladiums fade away when the temps turn cooler.
We leave ours in the ground all winter,
but where you're at,
I would think you would have to dig them up
and store them inside to keep them from freezing......cheryl