Yellowing Leaves on Yellow Calla Lily: Dormancy vs. Cultural Issues

Normal Post-Bloom Behavior

Colored calla lilies (hybrid Zantedeschia) naturally go dormant after flowering. Yellowing, wilting leaves — while flowers remain attractive — are typical signs the plant is entering its rest period. This is not a sign of poor care.

Cultural Factors to Review

• Sunlight: 2–4 hours may be insufficient; colored callas prefer full sun (6+ hours) for best performance.
• Watering: Once weekly without rain is adequate. Overwatering promotes rot.
• Fertilizer: Apply balanced 12-12-12 at planting and monthly during active growth only.

Dormancy Management

1. Allow foliage to die back completely.
2. In zones colder than 9, lift rhizomes (corms) before first frost.
3. Store in a cool (40–50°F), dry, dark place in peat moss or vermiculite.
4. Replant in spring after danger of frost.

Note on White vs. Colored Callas

White callas (Z. aethiopica) stay evergreen in frost-free areas. Colored hybrids are deciduous and require dormancy. Your plant’s behavior is normal for its type.