It should be okay as long as the crown and rhizome are okay. They overwinter all the time without any pads. Link below that might help; scroll down about halfway down on the linked page, shows how to plant correctly. Here is a link that might be useful: Link

To be more specific and answer your question, after LAST frost I would put the pot outside. You are in zone 6 right? Keep in a sunny location, water well and after 1st frost follow previous advice. Here's what I include with bulbs I've given away or donated plant sales: Zantedeschia albomaculata: Calla Lily Form: Tender bulb. Exposure: Full Sun. Height: 24" (to 30" bloom). Spread: 18-24". Zone: 8-10. Flower Date: June-July. >Planting Reqs: Plant 4-8" deep and 18-24" apart when all danger of frost has passed (last week of May in ELong.). I plant those in back 4" deep and those in front 6-8" then cover all with 2" of compost/mulch. Fertilize using a 5-10-10 or 5-10-5 fertilizer. >Lifting Reqs: Lift the rhizomes after first frost, cut back stems, clean off excess soil, let dry out of the direct sun for a few days and then store in a dry location that remains between 50 and 60 degrees F. They can be divided before storage as long as the cut portions are allowed to dry. Doing so will prevent the open wounds from rotting. I use perlite in a PAPER bag. Check in late January. If rot is evident cut, scrape and clean off all rot. Coat cut surface liberally with powdered anti-fungal or cinnamon pushed firmly into flesh. Let dry and store. >Soil Reqs: Slightly acidic (6-6.5) well drained, humus enriched sandy loam. Adding mulch to the soil will help maintain a constant soil temperature. This will help keep the plant stress-free. Mulch will also improve the texture of the soil and help hold in valuable moisture. Calla lilies thrive in well-drained, loose soil. >Pruning: Remove spent flower stems to tidy up your plants and strengthen leaves and corm. >Note: Watch out for Japanese Beetles. Hope this helps. Evan

Thanks chas and PKponder. Now all I have to worry about is that it gets enough sun. I might have to cut a few tree branches. I also downsized one of my little above-ground ponds from a 300 gallon tank to a 100 gallon tank. That's why I ordered the pygmy lily. It's hard giving some things up, but the older I get and the more arthritis I get, I've got to come to terms with all the "stuff" I have to do. I hate Fall and having to winterize things and drain several of my stock tanks........but man do I love having those lily blossoms and tree frogs singing in the summer!

Thanks tropicbreezent! I wish I had gone ahead and spent the extra money on a larger one that comes with large leaves already. Oh well...this one will probably be fine for next year.