I usually order bulbs in January and have them sent to me by March. Here the night temps are in the 50s by then, if not warmer. Caladiums always go dormant when the ground temp is about mid 40°. I have been successful starting them early in pots and keeping them warmer than they'd be in the ground. Even though caladiiums like plenty of water, they don't like it to be wet and cold. The bulbs will just rot.
I have saved bulbs over winter, but they just aren't the same. 'Much smaller and weaker.
Here's a good website for answers to a few questions about them. Just scroll down caladiums.
http://aggie-horticulture.tamu...
