Calla Lily Hardiness in Southern Indiana

Not Winter-Hardy in Zone 6

Calla lilies (Zantedeschia) are perennial but only hardy to zone 8 (zone 7 for large white 'Aethiopica' types). In southern Indiana (zone 6), rhizomes must be dug after first frost, cleaned, and stored cool, dark, and dry until spring soil reaches 65°F.

Alternative: Container Growing

Grow in pots and move indoors to a cool basement for winter. This avoids annual digging and ensures survival.