You can grow these babies outdoors ... They grow from rhizomes, not bulbs, and should be divvied up and repotted every several years or so. "Calla lilies should be watered once the top inch ...

Canna bulbs, or rhizomes, grow into stunning canna lilies, blooming in shades of bold ... Leaving canna bulbs in the ground when it's too cold outside can lead to the bulbs freezing or beginning ...