How to Grow Spathiphyllum
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Spathiphyllum
Spathiphyllum wallisii
flowerSpathiphyllum, commonly known as Peace Lily, is a tropical evergreen houseplant prized for its elegant white spathes (modified leaves) and dark green foliage. It is one of the most popular indoor plants, known for its air-purifying qualities and ability to thrive in low-light conditions. The plant produces small white flowers nestled within distinctive white bracts that resemble lily blossoms.
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Example Spathiphyllum timeline · Pittsburgh, PA (Zone 6b)
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Plant Spathiphyllum
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Spathiphyllum blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives indoors year-round in zones 10b-11; grown as houseplant in all zones
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Establishment
2-4 weeksRecently potted plant acclimating to home environment with existing root system
Place in moderate indirect light, maintain consistent moisture, avoid fertilizing for first month. Allow plant to adjust to new conditions.
Vegetative Growth
Ongoing, 2-3 months for noticeable growthPlant produces new leaves and stems, foliage expands, no flowers present yet
Provide bright indirect light and warm temperatures (65-80°F). Fertilize monthly during growing season with balanced houseplant fertilizer. Rotate pot weekly for even growth.
Flowering
Flowers can persist 1-2 months, blooming occurs spring through fall indoorsPlant develops characteristic white spathes (modified leaves) and small white flower spikes within the spathe
Maintain consistent watering and humidity. Ensure adequate indirect light to promote blooming. Remove dust from leaves with soft cloth to improve photosynthesis.
Mature Plant
Years, can live decades with proper careFully established plant producing regular foliage and periodic flowers, reaches 1-4 feet tall depending on variety
Continue regular watering and monthly fertilizing during growing season. Prune dead leaves and stems to maintain shape. Repot every 1-2 years in spring.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, mist foliage regularly, spray with insecticidal soap or neem oil if severe. Isolate plant to prevent spread.
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Remove with cotton swab dipped in rubbing alcohol, apply neem oil, or use insecticidal soap. Check plant regularly for reinfestation.
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Scrape off manually, treat with horticultural oil or insecticidal soap. May require multiple applications.
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Allow soil surface to dry between waterings, use sticky traps, apply Bti (Bacillus thuringiensis israelensis) if severe.
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Reduce watering frequency, ensure pot has drainage holes, repot in fresh soil if roots are black and mushy. Prevent by avoiding waterlogged conditions.
Uses
Air Purification
HouseholdSpathiphyllum is recognized by NASA and multiple studies as an effective air-purifying plant, removing toxins such as formaldehyde, benzene, and trichloroethylene from indoor air. Makes it an excellent choice for offices and bedrooms. [source]
Not Edible - Caution Advised
CulinarySpathiphyllum contains calcium oxalate crystals and is toxic if ingested. Can cause mouth irritation, swallowing difficulty, and stomach upset. Keep away from children and pets. [source]
Cut Flower Arrangements
CraftThe elegant white spathes and glossy green leaves make Spathiphyllum flowers excellent for floral arrangements and decorative displays. Flowers last 2-3 weeks in a vase with fresh water. [source]
Interior Decoration
HouseholdWith its sophisticated appearance and adaptability to indoor lighting conditions, Spathiphyllum is widely used as a decorative houseplant in homes, offices, and commercial spaces. Its compact to medium size fits various room settings. [source]
Wilting Signal Indicator
HouseholdSpathiphyllum visibly wilts when it needs water, making it an excellent indicator plant for humidity and watering levels. This dramatic signal helps gardeners recognize watering needs quickly, though the plant recovers readily when watered. [source]
Harvest Tips
Peace Lily is not harvested for fruit or vegetables. Remove dead or yellowing leaves as they appear to maintain plant health and appearance. Flowers can be enjoyed on the plant or cut for indoor arrangements; they last several weeks.
Fun Facts
- 🌱 Spathiphyllum 'flowers' are not true flowers—the white spathe is a modified leaf, while the actual flowers are tiny and clustered on the spadix (the spike emerging from the spathe).
- 🌱 Peace Lily can live for decades indoors with proper care, with some plants reported to thrive for 40+ years in stable household conditions.
- 🌱 The plant is native to tropical rainforests of Central and South America and Southeast Asia, which explains its preference for warm, humid conditions and tolerance of low light similar to forest understory.
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