Peace Lily (Spathiphyllum wallisii)

About Peace Lily

Peace lily (Spathiphyllum wallisii) is the rare houseplant that delivers both beauty and function in the most challenging indoor conditions. While most flowering plants demand bright light, peace lily blooms reliably in shaded corners, dim hallways, windowless offices, and air-conditioned Manila condominiums — places where other plants barely survive, let alone flower. Its signature white spathe, rising on a slender stalk above dark green glossy foliage, brings elegance to spaces that most plants cannot serve. For Filipino urban growers with limited window space, peace lily is one of the most rewarding choices available.

Beyond its aesthetic value, peace lily earned scientific distinction as one of the most effective air-purifying houseplants ever tested. NASA's 1989 Clean Air Study identified it as one of only a few plants that removes all six tested volatile organic compounds — formaldehyde, benzene, trichloroethylene, xylene, toluene, and ammonia. This last compound is notable because very few plants in the study removed ammonia effectively. Peace lily also has an exceptionally high transpiration rate, actively releasing moisture into the air and contributing to healthier indoor humidity levels — particularly beneficial in air-conditioned Philippine offices and bedrooms.

The genus Spathiphyllum belongs to the Araceae (aroid) family, alongside monstera, pothos, anthurium, and philodendron. The common name "peace lily" comes from the white spathe's resemblance to a white flag of truce, though the plant is not a true lily (Liliaceae family) at all. Over 40 species of Spathiphyllum exist, with numerous hybrid cultivars bred for size, flower frequency, and foliage characteristics. In the Philippines, the most commonly available are compact varieties suited to tabletop and desktop display, though the giant cultivar 'Sensation' — reaching 150-180 cm — is increasingly popular as a statement floor plant.

Peace lily communicates its needs with remarkable clarity. When thirsty, the entire plant droops dramatically, looking almost dead — then recovers completely within hours of watering, perking back up as if nothing happened. This dramatic wilt-and-recover cycle makes peace lily one of the easiest houseplants to care for: it literally tells you when it needs water. This forgiving, communicative nature, combined with its ability to flower in low light and purify indoor air, makes it one of the most recommended plants for beginning gardeners and office environments alike.

History & Discovery

Spathiphyllum wallisii is native to the tropical rainforests of Central America, northwestern South America, and parts of Southeast Asia — growing as an understory plant on the forest floor in dense shade beneath the canopy. The genus was first described by Austrian botanist Heinrich Wilhelm Schott in 1832. The species name wallisii honors Gustav Wallis, a 19th-century German plant collector who explored extensively in Central and South America, collecting specimens that were shipped back to European botanical gardens and herbaria. Wallis discovered the species in Colombia during one of his many expeditions.

The genus name Spathiphyllum derives from Greek: spathe (a broad blade) + phyllon (leaf) — referring to the leaf-like spathe that surrounds the flower cluster. This accurately describes what many people call the "flower" — it is technically a modified leaf (bract) evolved to attract pollinators to the small, inconspicuous true flowers on the central spadix.

Peace lily became widely popular as a houseplant in the 1970s and 1980s, particularly after NASA's Clean Air Study brought attention to its air-purifying capabilities. In the Philippines, peace lily has been a common indoor plant for decades, found in homes, offices, churches, hotel lobbies, and shopping mall atriums. During the 2020-2021 plantita/plantito craze, peace lily saw renewed interest among younger Filipino growers, though it never commanded the premium prices of trendier aroids like monstera or philodendron — its consistent availability and affordability kept it accessible to everyone. Today it remains one of the most commonly grown indoor plants in the Philippines, valued especially by urban apartment dwellers with limited natural light.

How to Plant Peace Lily in the Philippines

Peace lily is widely available and affordable in the Philippines — plant shops, garden centers, hardware stores, supermarket garden sections, and online sellers all carry common varieties. Small tabletop plants cost as little as ₱100-300, while larger specimens and the giant 'Sensation' variety range ₱500-2,000. Propagation is done exclusively by division — peace lily cannot be propagated from leaf or stem cuttings like pothos or monstera.

Propagation by Division

1. Wait for multiple crowns: Mature peace lilies produce multiple growth crowns (leaf clusters) from the root base. Division works best when the plant has at least 3-4 distinct crowns in the pot. A single-crown plant should not be divided — let it mature first. Overgrown, root-bound plants that have filled their pot are ideal division candidates.
2. Remove from pot and separate: Water the plant a day before dividing to reduce root stress. Remove the entire root ball from the pot. Gently tease apart the root mass, separating individual crowns. Each division should have at least 3-4 leaves and a healthy cluster of roots. Use a clean, sharp knife to cut through tangled root connections if needed — peace lily roots are tough and resilient.
3. Prepare moisture-retentive potting mix: Peace lily prefers richer, more moisture-holding soil than other aroids. Mix 2 parts coco peat or peat moss + 1 part perlite + 1 part compost or worm castings. The mix should hold moisture evenly without becoming waterlogged. Peace lily does not need the chunky bark mix that monstera and pothos prefer — a finer, humus-rich texture suits it better.
4. Plant divisions at correct depth: Fill pots one-third with mix. Position each division so the crown (where leaves emerge) sits at soil level — not buried. Burying the crown too deep causes stem rot. Fill around the roots, press gently, water thoroughly until water drains from the bottom. Use pots with drainage holes — peace lily tolerates moisture but not standing water.
5. Place in low to medium indirect light: Peace lily is an understory plant adapted to deep shade. Position away from direct sunlight — in the interior of a room, on a desk in an office, in a hallway, or near a north-facing window. Direct sun scorches the thin, dark green leaves, causing bleached yellow patches. The plant survives in very low light but flowers more in medium indirect light — near a window with filtered light or under bright artificial lighting.
6. Maintain consistent moisture: Water when the top 2-3 cm of soil dries. Peace lily droops dramatically when thirsty — this is your clearest watering cue. Water thoroughly, let excess drain. New divisions may droop for the first week as they establish — keep soil lightly moist but not soggy during this adjustment period. Expect recovery in 1-2 weeks.

Best Planting Season

Peace lily can be planted and divided year-round in the Philippines. Division is least stressful during the warm, humid months (May-October) when high humidity helps freshly divided plants recover faster. Avoid dividing during brief cool spells in December-January when growth slows. Peace lily has no true dormancy in the Philippine climate — it grows continuously year-round with slightly faster growth during warmer months.

Care Guide

Sunlight

Low to medium indirect light — peace lily is a true shade plant. It thrives in conditions that most houseplants merely tolerate: dim hallways, office interiors lit only by fluorescent lights, rooms with small windows, and corners far from any window. Direct sunlight burns the thin, dark green leaves — even short exposure to direct afternoon sun can cause yellow or bleached patches. For optimal flowering, provide medium indirect light — near a bright window but out of direct sunbeams. For foliage-only growth, even very low light is adequate. Peace lily is the go-to recommendation for Manila apartments and condominiums with north-facing or blocked windows.

Water

Moderate — keep soil consistently moist but not soggy. Water when the top 2-3 cm of soil dries. In Manila: roughly every 5-7 days in dry season, every 7-10 days in wet season or air-conditioned rooms. Peace lily gives the clearest watering signal of any houseplant — it droops visibly when thirsty. While dramatic, this droop is not harmful if addressed promptly. Chronic underwatering (repeatedly letting the plant fully wilt before watering) weakens it over time. Peace lily is sensitive to fluoride and chlorine — let tap water sit overnight before use if your supply is heavily treated, as these chemicals cause brown leaf tips over time.

Soil

Rich, moisture-retentive, well-draining mix. Unlike monstera and pothos that need chunky bark mixes, peace lily prefers a finer, humus-rich soil that holds moisture evenly. Ideal blend: 2 parts coco peat + 1 part perlite + 1 part compost. The perlite prevents compaction and provides drainage while the coco peat holds moisture. Avoid pure garden soil (compacts), pure sand (drains too fast), or pure coco peat (stays too wet). Slightly acidic to neutral pH (5.8-6.5) is ideal.

Humidity & Temperature

Peace lily loves Manila's natural humidity (60-80%) — no special accommodation needed in most Philippine homes. Temperature range: 18-32°C, with the sweet spot at 22-30°C. Air-conditioned rooms (18-24°C, lower humidity) are tolerated well, though brown leaf tips may develop from dry air. If this occurs, mist leaves every few days, group plants together, or place a shallow tray of pebbles and water beneath the pot. Peace lily is cold-sensitive — temperatures below 12°C cause damage. In the Philippines this is only a concern in highland areas like Baguio during cool season.

Fertilizer

Monthly feeding during the growing season with balanced liquid fertilizer (10-10-10 or 20-20-20) diluted to half the recommended strength. Peace lily is a light feeder — over-fertilizing causes salt buildup in the soil, leading to brown leaf tips and root damage. Organic alternatives: dilute worm casting tea, compost tea, or seaweed extract. Reduce to every 6-8 weeks during slightly slower growth in December-January. If brown leaf tips appear despite proper watering, excess fertilizer salt is often the cause — flush the soil with plain water 2-3 times to leach out buildup.

Pruning & Maintenance

Remove yellowing lower leaves by cutting the leaf stalk at the base — older leaves naturally yellow and die as new growth emerges from the center crown. Cut spent flower stalks at the base once the spathe turns fully green or brown — dead flowers drain energy. Wipe leaves with a damp cloth monthly to remove dust — clean leaves photosynthesize more efficiently. Peace lily does not need pruning for shape — it grows in a compact, self-organizing rosette. Repot every 1-2 years when the root mass fills the pot and the plant starts drying out faster than usual between waterings.

Growing Medium Options

Ornamental Uses

Peace lily's combination of elegant white flowers, lush dark green foliage, and shade tolerance makes it one of the most versatile indoor ornamental plants. Its compact growth habit and clean aesthetic suit every setting from minimalist modern condominiums to traditional Filipino homes, corporate offices, and public spaces.

Interior Design Applications

• Tabletop and desk plant: Compact varieties (30-50 cm) are ideal for office desks, side tables, dining tables, and shelving — small enough to fit any surface while providing the elegance of a flowering plant that blooms in office lighting conditions
• Statement floor plant: Giant varieties like 'Sensation' (120-180 cm) serve as dramatic floor plants for living rooms, entryways, and lobbies — their large, ribbed leaves create a lush tropical presence even in interior locations far from windows
• Low-light specialist: Peace lily is the primary recommendation for dark corners, windowless offices, interior hallways, and rooms with small or blocked windows — it provides living greenery and flowers where no other flowering plant can survive
• Bathroom plant: The humidity-loving nature makes peace lily ideal for bathrooms — it thrives in the warm, humid, low-light conditions typical of Philippine bathrooms, adding elegance to an often-neglected space
• Spa and wellness aesthetic: The serene white flower on dark green foliage is associated with calm, cleanliness, and wellbeing — making peace lily a staple in spas, meditation rooms, yoga studios, and wellness centers in Metro Manila

Landscape Uses

• Shaded garden beds: Mass-planted under trees or alongside buildings where direct sun never reaches — peace lily forms dense, flowering ground-level displays in deep shade
• Covered patio and lanai: Potted or planted along covered walkways, verandas, and carports where filtered light creates ideal conditions for continuous blooming
• Water feature companion: Planted around garden ponds, fountains, and water features — the moisture-loving nature and elegant white flowers complement aquatic settings
• Commercial landscaping: Used extensively in mall atriums, hotel lobbies, restaurant interiors, and office building common areas throughout Metro Manila — low maintenance and reliable flowering under artificial lighting

Air Quality & Oxygen

Peace lily earned its reputation as a top-tier air-purifying plant through NASA's 1989 Interior Landscape Plants for Indoor Air Pollution Abatement study, where it was among the most effective plants tested. It successfully removed formaldehyde, benzene, trichloroethylene, xylene, toluene, and ammonia from sealed test chambers. The ammonia removal is particularly notable — peace lily was one of only a few plants in the study that effectively neutralized ammonia, a common indoor pollutant from cleaning products, cooking, and cigarette smoke.

Peace lily also has an exceptionally high transpiration rate — it releases significant amounts of moisture into the air through its large, thin leaves. This natural humidifying effect raises indoor relative humidity, which benefits respiratory comfort and reduces static electricity in air-conditioned spaces. In Manila offices and condominiums where air conditioning runs for extended hours, peace lily's moisture output helps counteract the drying effect of AC systems. A group of 3-5 peace lilies in a standard room provides measurable humidity improvement. Combined with its oxygen production and VOC absorption, peace lily is genuinely one of the most beneficial indoor plants for health-conscious urban dwellers.

Toxicity & Safety

Humans: Peace lily contains insoluble calcium oxalate crystals (raphides) in all parts — leaves, stems, and roots. Chewing or biting the plant releases microscopic needle-shaped crystals that puncture mouth and throat tissues, causing immediate burning pain, swelling, drooling, and difficulty swallowing. The pain is intense enough to prevent significant ingestion. While uncomfortable, peace lily toxicity in humans is classified as mild to moderate and is not life-threatening. Wash hands after handling if sap contacts skin. Keep away from small children who might put plant parts in their mouths.

Pets: The ASPCA lists peace lily as toxic to dogs and cats. The calcium oxalate crystals cause the same oral irritation in pets: pawing at the mouth, drooling, oral swelling, vomiting, and difficulty swallowing. Cats are more likely to chew houseplants than dogs, and peace lily's low-growing habit makes it easily accessible. The toxicity is typically self-limiting — the painful crystals deter continued chewing. However, place peace lilies on elevated surfaces, plant stands, or in rooms pets cannot access. If a pet ingests peace lily, offer water or milk to dilute the crystals and contact your veterinarian if symptoms persist beyond a few hours.

Common Pests & Diseases in the Philippines

• Mealybugs: White, cottony insects at leaf bases and along stalks — the most common peace lily pest in the Philippines. They cluster in the tight spaces where leaf stalks emerge from the crown. Remove with alcohol-dipped cotton swab. Neem oil spray for larger infestations. Check the central crown area regularly — mealybugs hide in the curled emerging leaves.
• Spider mites: Tiny mites causing stippled, yellowing leaves — most common in hot, dry, air-conditioned rooms. Fine webbing on leaf undersides is the telltale sign. Wipe leaves with a damp cloth weekly (both sides). Increase humidity. Neem oil or insecticidal soap for active infestations.
• Scale insects: Brown or tan shell-like bumps on stems and leaf midribs — stationary insects that suck sap and excrete sticky honeydew. Scrape off with a soft brush or fingernail. Apply neem oil. Heavy infestations weaken the plant and attract sooty mold.
• Root rot: Mushy, brown, foul-smelling roots from chronic overwatering or waterlogged soil. Causes wilting that does not respond to watering, yellowing, and eventual plant death. Prevention: use well-draining mix, ensure pots have drainage holes, never let the plant sit in standing water. Treatment: unpot, trim rotten roots (healthy roots are white and firm), repot in fresh mix, reduce watering frequency.
• Leaf spot (Cylindrocladium): Brown or black spots on leaves, sometimes with yellow halos — caused by fungal pathogens that thrive in warm, humid Philippine conditions. Remove affected leaves. Avoid wetting foliage during watering. Improve air circulation around the plant. Fungicide application for severe cases.
• Brown leaf tips: Not a pest but the most common peace lily complaint in the Philippines. Causes: fluoride or chlorine in tap water, excess fertilizer salts, or low humidity from air conditioning. Solutions: use filtered or rested tap water, reduce fertilizer concentration, mist leaves in AC rooms. Cut brown tips off for aesthetics — the rest of the leaf remains healthy.

Frequently Asked Questions

Sources

• Plants of the World Online — Spathiphyllum wallisii Regel. Royal Botanic Gardens, Kew.
• Wolverton, B.C., Johnson, A., & Bounds, K. (1989). Interior Landscape Plants for Indoor Air Pollution Abatement. NASA Stennis Space Center, MS.
• ASPCA — Animal Poison Control Center: Toxic and Non-Toxic Plant Lists — Spathiphyllum.
• Henny, R.J. & Chen, J. (2003). Cultivar Development of Ornamental Foliage Plants. Plant Breeding Reviews, 23.
• Royal Horticultural Society — Spathiphyllum wallisii growing guide.

This guide is for informational purposes. Consult local plant nurseries for variety-specific care advice.