Q.storing calla lily
What are the pods that form when a Calla Lily flower dies off? Is there another medium that can be used to store the root ball over the winter other than peat moss? What is the best way to store them?

The pods are seed heads that have formed.
Here is a link with more information.
https://www.gardeningknowhow.com/ornamental/bulbs/calla-lily/calla-lily-seed-info.htm
Sawdust will work also for winter storage of bulbs.
https://www.gardeningknowhow.com/ornamental/bulbs/bgen/flower-bulb-shelf-life.htm