How to Care for a Calla Lily Plant: Complete Guide

By Rachel Green · November 16, 2025

To care for a calla lily plant, provide bright, indirect light, keep the soil consistently moist but well-drained, maintain moderate humidity, and feed monthly during the growing season with a balanced fertilizer. Plant in rich, slightly acidic soil and protect from extreme temperatures.

Understanding Calla Lily Care Basics

Calla lilies (Zantedeschia spp.) are prized for their elegant, funnel-shaped blooms and lush foliage. Though often treated as indoor ornamentals, they thrive both indoors and outdoors in suitable climates. Proper care ensures vibrant flowering and long-term health.

Key Factors in Calla Lily Maintenance

Bright, indirect sunlight prevents scorching while promoting blooming
Consistent moisture without waterlogging avoids rhizome rot
Well-draining, nutrient-rich soil supports healthy root development
Temperature between 60°F and 75°F (15–24°C) mimics native habitat
Monthly feeding with a balanced liquid fertilizer during active growth

Light Requirements for Optimal Growth

Calla lilies perform best in bright, indirect light. Direct midday sun can burn leaves, especially indoors. Outdoors, partial shade in warm climates extends bloom life. Insufficient light leads to leggy growth and reduced flowering.

Indoor vs. Outdoor Light Conditions

Indoors, place near an east- or west-facing window. Outdoors, choose spots with morning sun and afternoon shade. In USDA zones 8–10, callas can grow year-round with proper mulching.

Watering and Soil Needs

Maintain evenly moist soil, particularly during active growth and blooming. Allow the top inch of soil to dry slightly between waterings. Use a loamy, well-draining potting mix with added organic matter. A pH between 6.0 and 6.5 is ideal.

Avoiding Common Watering Mistakes

Overwatering: Leads to yellow leaves and rhizome rot
Underwatering: Causes drooping and bud drop
Poor drainage: Increases disease susceptibility

Care Factor	Optimal Range	Minimum Tolerance	Maximum Tolerance
Soil Moisture	Evenly moist	Slightly dry top inch	No standing water
pH Level	6.0 – 6.5	5.5	7.0
Temperature (°F)	60 – 75	50	85
Fertilizer (N-P-K)	10-10-10 monthly	Half strength every 6 weeks	Full strength every 4 weeks
Humidity (%)	50 – 60	40	70

Table data source:1, 2

The data shows that calla lilies require a narrow range of environmental conditions for peak performance. Notably, soil pH and temperature tolerance are limited, emphasizing the need for monitoring. Humidity levels above 70% may encourage fungal diseases, especially in poorly ventilated areas.

Fertilizing and Seasonal Care

Feed with a balanced 10-10-10 fertilizer once a month during spring and summer. Reduce feeding in fall and cease in winter when the plant enters dormancy. After blooming, gradually reduce watering to allow the plant to rest. Dormant rhizomes can be stored in a cool, dry place if grown in containers.

Encouraging Reblooming

After a 2–3 month dormancy period, repot if necessary and resume regular watering and lighting. New growth typically emerges within 6–8 weeks. This cycle mimics natural growing patterns and improves flower production.

Common Problems and Pests

Yellow leaves often indicate overwatering or poor drainage. Brown leaf tips suggest low humidity or salt buildup. Aphids, spider mites, and mealybugs may infest indoor plants; treat early with insecticidal soap or neem oil.

Preventative Measures

Inspect new plants before introducing them indoors
Wipe leaves regularly to deter pests
Avoid overcrowding to improve air circulation

Frequently Asked Questions About Calla Lily Care

How often should I water my calla lily plant?

Water your calla lily when the top inch of soil feels dry, typically once a week indoors. During active growth, keep soil consistently moist but never soggy. Reduce frequency in winter during dormancy.

Can calla lilies grow in full sun?

Calla lilies tolerate morning sun but prefer partial shade, especially in hot climates. Full afternoon sun can scorch leaves and shorten bloom life. Indoors, bright indirect light is optimal.

Why are my calla lily leaves turning yellow?

Yellow leaves usually result from overwatering or poor drainage, leading to root rot. It can also signal nutrient deficiency or natural dormancy. Check soil moisture and adjust care accordingly.

Do calla lilies need to go dormant?

Yes, most calla lilies benefit from a 2–3 month dormancy period after blooming. Gradually reduce watering, let foliage die back, and store the rhizome in a cool, dry place before replanting.

Are calla lilies toxic to pets?

Yes, calla lilies contain calcium oxalate crystals, which are toxic to cats, dogs, and other pets. Ingestion can cause oral irritation, drooling, and difficulty swallowing. Keep out of reach of animals.