Hi Sandy2,

I found this post over at The Bulb Forum. Can I keep my bulbs in a pot outside over the winter
It addresses storing pots of callas in a garage or unheated area, but no mention is made of watering them. You might ask on that thread, or even start a new one.

Sue

Sandy -

I know I am posting this late, but I just found this posting. I overwinter calla lily bulbs every year without any problems. I keep them with my dahlias and crocosmia that overwinter. Everything is put into my attic, right at the top of the stairwell. My attic is not heated, yet the heat from the stairwell seems to be enough to keep all of my tender bulbs/tubers from freezing to death. This method has served me well for a number of years without any problems.

How did you overwinter them? I see you posted this in early November.