Description : when to transplant calla lilies
Last Answer : Calla lilies are not frost tolerant in areas colder than USDA Hardiness Zones 9 and 10. In all other zones, the rhizomes need to be dug up and stored for the winter. In the fall, after the first ... humus-rich soil that is free-draining. Plant the rhizomes 4 inches deep and 12 to 18 inches apart.