Growing Calla Lilies in Northern New York: Hardiness, Sun, and Winter Storage

Calla lilies are stunning but not reliably hardy in Zone 4–5 (northern NY). Here's how to enjoy them as seasonal plants.

Types & Hardiness

• Colored hybrids: Bloom a few weeks, then go dormant ~90 days. Not winter-hardy; tubers must be lifted.
• White calla (Z. aethiopica) & tall yellows: Longer bloom, foliage persists, but still not hardy below Zone 7.

Planting & Summer Care

• Plant after last frost in full sun (≥6 hours morning/early afternoon).
• Amend soil with bone meal; keep moist but well-drained.
• Mulch to retain moisture.

Overwintering

1. After foliage yellows (fall), dig tubers.
2. Clean, dry a few days, store in peat/vermiculite in cool (40–50°F), dark, dry basement.
3. Check monthly; mist if shriveling.
4. Replant in spring after frost.

Alternatively, grow in pots and move indoors for winter.