Calla lily is an old-fashioned garden favorite that blooms in late spring and early summer. The plant grows to 36 inches high and needs almost a full day of sun to thrive. If you live within the specified USDA hardiness zones for this plant (8 through 11), transplant your calla lily immediately after digging it up. Otherwise, store it in a dry, cool area and transplant in the spring, after the danger of frost has passed.
Dig up the tubers when calla lilies go dormant in the fall. The foliage will yellow and then turn brown. When it begins to die back, it is safe to dig up the tubers. Use a wide trowel to dig underneath the tuber and lift it from the soil. The plant bruises easily, so handle gently.
Prepare the soil in the new location by adding 2 to 3 inches of compost and mixing it to a depth of 6 inches.
Dig holes the same depth as the holes in which the calla lilies were previously growing, 18 inches apart, and drop the tubers into the holes. Cover them with soil, but don't pack it down.
Water the calla lily tubers just enough to slightly moisten the soil.
Cover the planting area with shredded leaves or mulch if you experience frost in your region. Wait until the week prior to the first frost to cover them.