Peace lilies (Spathiphyllum) are renowned for their elegant appearance and air-purifying qualities. Originating from the tropical forests of Central and South America, these plants have become popular indoor houseplants in the U.S. They can also thrive outdoors in suitable conditions during the summer. With around 50 species in the Spathiphyllum genus, peace lilies are appreciated for their lush green foliage and striking white blooms, which are actually specialized leaf bracts that encase the true flowers.
Quick Facts about Peace Lilies
- Botanical Name: Spathiphyllum
- Height: 1 to 6 feet (0.3 to 1.8 m)
- Spread: 1 to 5 feet (0.3 to 1.5 m)
- Sun Exposure: Partial to deep shade
- Soil Requirements: Rich potting soil
- Hardiness Zones: 11 and 12
- When to Plant: Year-round indoors
How to Grow a Peace Lily
Peace Lily Light Requirements
In their native habitat, peace lilies are accustomed to dappled light and can tolerate deep shade. As houseplants, they thrive in bright, filtered light. Direct sunlight can scorch their leaves, so it’s best to avoid it. While peace lilies in brighter conditions tend to produce more frequent blooms, those in low light may focus more on their foliage rather than flowering.
Watering Peace Lily Plants
Peace lilies prefer moist soil but should never be waterlogged. Overwatering can lead to root rot, so ensure good soil drainage. Check the soil regularly by touching its surface; if it’s dry, it’s time to water. Peace lilies are somewhat drought-tolerant, so waiting until the plant shows signs of wilting before watering is usually fine.
Peace Lily Repotting Tips
Peace lilies generally need repotting only when their roots start emerging from the drainage holes or the base of the pot. Indicators for repotting include drooping shortly after watering or overcrowded leaves. Repot in late winter or early spring, choosing a pot that is at least 2 inches (5 cm) larger than the current one.
How to Propagate Peace Lilies
Propagation of peace lilies is done through division. Gently separate crowns from the main plant or cut the rootball in half with a sharp knife. Replant each section in its own container, ensuring they have adequate space to grow.
Soil & Fertilizer for Peace Lily Plants
Use a high-quality, well-draining potting mix for peace lilies. Fertilize every six to eight weeks during the growing season with a general houseplant fertilizer, but only at a quarter of the recommended strength. Avoid over-fertilization, as it can cause leaf tip burn.
Problems, Pests & Diseases
Peace lilies are generally resilient, but they can suffer from root rot if overwatered. Common pests include mealybugs and scale. Regularly dust the large leaves to improve light absorption and inspect for pests. Avoid commercial leaf shine products; instead, wash the leaves with water or give them a gentle shower.
Peace Lily Varieties
Several species and cultivars of peace lilies are popular among gardeners:
- Spathiphyllum wallisii: Commonly grown with glossy, lance-shaped leaves and white spathes.
- “Sensation”: The largest cultivar, reaching up to six feet (1.8 m) with dark green, textured leaves.
- “Mauna Loa Supreme”: Medium-sized, growing to about two or three feet (0.6 to 0.9 m) with large white flowers.
- “Allison”: A smaller variety, around two feet (0.6 m) tall, known for its profuse flowering.
- “Jetty”: Also around two feet (0.6 m) with glossy leaves and long-lasting flowers.
- “Little Angel”: A compact variety growing to about 12 inches (30 cm), known for prolific blooms.
- “Jet Diamond”: A newer cultivar with dark green leaves and silvery variegation.
By following these care guidelines, you can enjoy the beauty and benefits of peace lilies as a stunning addition to your indoor space.
