Tips for Calla Lily Bulbs

Winter Protection

• Rhizomes of calla lilies are injured at temperatures below 25 degrees Fahrenheit and need winter protection in most regions. In fall, after frost has killed the foliage, the rhizome can be removed from the soil and stored in a cool and dry environment. For protection against spring frosts, rhizomes can be started in a container indoors until warmer temperatures arrive.

Storage

• During winter, rhizomes of calla lilies should be stored in a dark, cool environment at a temperature between 40 to 55 degrees F. A dry environment is important because some species of calla lilies are susceptible to rot. Rhizomes can be stored in sphagnum peat or vermiculite.

Dividing Rhizomes

• Dividing the rhizomes of calla lilies is important for improving the health of your plants. Division can be done in fall or spring. Each division must have a growing point, sometimes referred to as an "eye."

Growing Environment

• Rhizomes of calla lilies should be planted about 2 inches deep, 18 inches apart and oriented horizontally. Calla lilies do well in full sun and moist soil.