How to Care for Calla Lily

Calla lilies (Zantedeschia aethiopica) are prized for their smooth, chalice-shaped spathes rising above lush arrow-shaped leaves. Grown from rhizomes, they bring an elegant, sculptural note to borders, containers, and pond margins, and reward attentive moisture with long-lasting blooms.

Light

Calla lilies flower best in full sun to partial shade. In cooler climates full sun promotes the most blooms, while in hot regions dappled or afternoon shade prevents leaf scorch and keeps flowers fresh. Indoors, give them the brightest position you can, ideally near a sunny window.

Water

Callas love moisture. Keep the soil consistently moist and never let it dry out during active growth and flowering; the classic Zantedeschia aethiopica even tolerates wet, marshy soil and can grow at pond edges. Reduce watering as foliage yellows and the plant enters dormancy, then resume as new growth appears.

Soil & Potting

Plant rhizomes in rich, moisture-retentive soil high in organic matter. Unlike many bulbs, callas tolerate heavy, damp ground. In containers use a fertile potting mix; plant rhizomes a couple of inches deep with the growing eyes facing up, and choose a pot large enough to support the substantial foliage.

Humidity & Temperature

Callas prefer warm conditions and appreciate moderate to high humidity. They grow actively in temperatures roughly between 60 and 75 F and are frost-tender; in cold climates lift the rhizomes before freezing or grow in pots to overwinter indoors. The evergreen Z. aethiopica can stay in leaf year-round in mild, frost-free areas.

Feeding

Feed regularly during active growth with a balanced liquid fertilizer every few weeks, easing off on high nitrogen, which encourages lush leaves at the expense of flowers. A fertilizer slightly higher in phosphorus supports blooming. Stop feeding as the plant heads into dormancy.

Propagation

The easiest method is division. Lift and separate the rhizomes during dormancy, ensuring each division has at least one growth eye, then replant. Callas can also be grown from seed, but this is slow and seed-grown plants take several years to flower, so division is preferred.

Repotting / Pruning

Repot or divide container callas every year or two when rhizomes fill the pot, ideally during dormancy. Remove spent flowers and yellowing leaves to keep the plant tidy and direct energy to healthy growth. As foliage dies back naturally at the end of the season, cut it away and reduce watering.

Common Problems & Pests

Rhizome rot from cold, stagnant, or overwet conditions during dormancy is the most common problem; ensure warmth and reduce watering when dormant. Aphids and spider mites may target foliage, and bacterial soft rot can affect stressed rhizomes. Remove damaged tissue and improve conditions promptly.

Seasonal Care Tips

Plant rhizomes in spring after frost for summer bloom. Keep soil moist and feed through the growing season. In fall, as leaves yellow, let the plant go dormant and, in cold climates, lift and store rhizomes in a cool dry place or overwinter potted plants indoors, restarting them in spring.