Overwintering Calla and Caladium Bulbs in Cold Climates

In southern New Hampshire (Zone 5), both callas (Zantedeschia) and caladiums must be lifted and stored indoors. Here are proven, step-by-step methods.

Caladiums (Tubers)

1. Timing: Dig before first frost, while leaves still have color.
2. Cure: Spread in a single layer, dry 1 week in shade.
3. Clean: Remove foliage and loose soil.
4. Optional: Pop out the central bud with a knife tip to encourage multiple smaller leaves next year.
5. Store: Pack in dry peat moss or vermiculite in cardboard boxes (shoe boxes work). Keep at 50–60°F—never colder. A heated basement or closet is ideal.

Callas (Rhizomes)

1. Lift after first frost.
2. Clean gently—do not wash; brush off soil.
3. Dry a few days out of direct sun.
4. Store in dry peat/vermiculite at 50–60°F.
5. Replant in spring after all frost danger passes.

Pro Tips

• Label each variety.
• Check monthly for rot or desiccation.
• Expect some loss—overwintering is a skill that improves with practice.
• Caladiums often perform best as annuals; buying fresh tubers each spring guarantees top quality.

With careful storage, you'll enjoy these tropical beauties again next summer.