You can store them in a dry warm ventilated area on flats or hanging in mesh bags. You can replant in spring when the weather is warm. This will save them from rotting in the ground due to cold wet conditions. It also has a pear shape that is flatter on the bottom. 4 inches or less apart Larger caladium bulbs mean more leaves.
Big leaves come from existing sprouts.
In storing caladiums keep them inside the house. Ideal is in an old pair of panty hose in the closet. Never store caladiums in the refrigerator. Other spring planted bulbs like gladiolas, dahlias, rain lilies, bletilla, tuberose, lilies are spring and fall blooming. Plant Glads March through May in two week intervals for a succession of bloom.