Calla Lily Seed Propagation: Depth, Spacing, and Watering for San Diego

Calla lily (Zantedeschia) seeds are fun to grow, but hybrids won’t come true. Here’s your San Diego plan:

Sowing

• Depth: 1 inch deep.
• Spacing: 2 inches apart in seed bed.
• Timing: Start now—warm soil (70°F+) needed for germination.

Water & Care

• Keep evenly moist, well-drained (never soggy—causes rot).
• Germination in ~2 weeks.
• At 2 inches tall, feed half-strength fish emulsion to boost corm growth.
• Transplant next spring when corms are marble-sized.

Spacing at Maturity

Plant 12–18 inches apart in garden. Full sun to part shade; rich, moist soil.

Expect variable flowers from hybrid seeds—may be inferior, but exciting to see!