Can You Change Calla Lily Color from Seed? No.

White calla lilies (Zantedeschia aethiopica) are genetically white. No treatment—chemical, environmental, or otherwise—can change their flower color.

Why Color Is Fixed

• Flower color is determined by genetics, not soil pH (unlike hydrangeas).
• Z. aethiopica lacks the pigment pathways for pink, purple, yellow, or orange.

Colored Callas Are Different Species/Hybrids

• Pink, purple, yellow, orange callas are Z. rehmannii, Z. elliottiana, or hybrids.
• They have different cultural needs (often more tender, need dry dormancy).

If You Want Color

Purchase bulbs of colored varieties. Your white callas will always be white—elegant, classic, and reliable.