I just rescued some potted calla lilies from the grocery store. They were in the discount section where we often find perfectly good plants that just need the right care. These particular calla lilies were forced to bloom for valentines day, since their blooming period had passed they were being discarded.
The great thing about bulbs, tubers and corms is that they usually will re-flower year after year when given the right growing conditions and care. Specifically calla lilies are grown from tubers and bloom in late spring and are considered “perennial bulbs” that will return year after year.
They are hardy in zones 9 & 10 and can be left in the ground between blooming seasons, in all other zones they will need to be dug up, dried and stored during the winter. Calla lilies don’t do well in frosty conditions and will often fail to return the next season if exposed to freezing temperatures.
The great thing about Calla lilies is that they can be grown as a houseplant easily. As houseplants they should be given a 2 to 3 month rest period without moisture once they bloom. Flowers will fade and can be cut back but the leaves will remain green until you reduce the amount of water given. Reducing the water after flowering will initate the 2 to 3 month rest period. After this time has passed they should be repotted and lightly watered until new growth appears.
If you prefer to grow your calla lilies outdoors you can start your in indoors in later winter and transplant them outdoors after your last frost in the spring, the calla lilies will grow and bloom through spring, summer and even fall but will need to be dug up, divided and stored during the winter if you aren’t in zones 9 or 10.