Growing Calla Lily (Zantedeschia): Elegant Blooms Indoors and Out

Indoor Container Growing (from Rhizome Kit)

Moisten potting mix. Fill pot ⅔ full. Set rhizome with growing tip up. Cover with remaining mix. Water thoroughly. Place in warm room. Keep soil evenly moist. When shoot appears, move to sunny south-facing window. Callas thrive in wet—even soggy—mix; keep saucer filled with water. Bloom in 8–16 weeks. In summer, move outdoors to full sun. Repot once or twice during growing season. Bring in before frost. In Zones 9+ (10°F+), plant in ground in spring in moist/boggy full sun.

Outdoor Growing

Plant after frost danger passes. Full sun or part shade (part shade required in South/warm West unless soil is constantly wet). Rich, moist soil. Plant rhizomes horizontally, growing points up, 3 inches deep in containers (3 per 12-inch pot) or garden. Hardy to Zone 9 (20°F); heavy mulch may allow survival in Zone 8 (10°F) or 7 (0°F). In colder zones, dig rhizomes before frost, store in dry peat/sand at 60–75°F. Container plants can stay in pot—bring in, withhold water until spring restart.