Spathiphyllum 'Mauna Loa' (Mauna Loa peace lily) care

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Tolerates low light but blooms best in bright indirect light. Keep out of direct sun, which scorches the foliage. An east window or a few feet back from a south or west window is ideal. If you can't decide, a free phone lux-meter app aimed at the leaf at noon should read between 800 and 1,500 lux.

Watering

Watering spathiphyllum 'mauna loa': when the top 2-3 cm of soil is dry, roughly every 5-7 days. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep the soil evenly moist but never waterlogged. The leaves wilt dramatically when dry and recover quickly after watering. Use room-temperature water and let chlorine off-gas, as fluoride and chlorine can cause leaf-tip browning.

Soil and pot

Spathiphyllum 'Mauna Loa' grows best in rich, well-draining peat-based potting mix. Use a loose, moisture-retentive aroid or general houseplant mix amended with perlite and bark for aeration. Aim for slightly acidic pH around 5.8-6.5. Ensure the pot drains freely to prevent root rot. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Spathiphyllum 'Mauna Loa' sits happiest at around 50-70% humidity and 18-27°C (65-80°F). A rainforest native that loves high humidity. Brown leaf tips signal dry air; group plants, use a pebble tray or run a humidifier. It tolerates average home humidity but foliage looks best above 50%. If you keep the room above 18 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed spathiphyllum 'mauna loa' sparingly. Feed every 6-8 weeks in spring and summer with a balanced liquid houseplant fertiliser diluted to half strength. Over-feeding causes leaf-tip burn and discourages flowering. Stop or reduce feeding in autumn and winter while growth slows. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on spathiphyllum 'mauna loa' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Dramatic wilting — Sudden collapse usually means the soil dried out; water thoroughly and the plant typically rebounds within a few hours. Chronic wilting despite moist soil points to root rot from overwatering.
• Brown leaf tips — Caused by low humidity, fluoride/chlorine in tap water, or over-fertilising. Use filtered or rested water, raise humidity and dilute feed.
• No flowers — Too little light is the usual cause. Move to brighter indirect light and feed lightly in the growing season; very young or recently divided plants also bloom sparsely.
• Yellowing leaves — Often overwatering or natural ageing of older outer leaves. Check drainage, let the surface dry between waterings, and remove spent foliage at the base.

Propagation

Propagate by division in spring. Lift the plant, tease the root ball apart into clumps each with several leaves and healthy roots, and pot up individually. Peace lilies do not root from leaf or stem cuttings. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Spathiphyllum 'Mauna Loa' is toxic to pets. The ASPCA specifically lists the Mauna Loa Peace Lily (Spathiphyllum) as toxic to cats and dogs. The toxic principle is insoluble calcium oxalate crystals, which on chewing cause oral and tongue irritation, intense burning, drooling, vomiting and difficulty swallowing. Despite the name it is not a true lily and does not cause feline kidney failure, but keep it out of reach of pets. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Spathiphyllum 'Mauna Loa' deep-dive guides

Every aspect of spathiphyllum 'mauna loa' care, each with its own calibrated guide:

• Spathiphyllum 'Mauna Loa' watering schedule
• Spathiphyllum 'Mauna Loa' light requirements
• Best soil mix for spathiphyllum 'mauna loa'
• Spathiphyllum 'Mauna Loa' fertilizing guide
• When to repot spathiphyllum 'mauna loa'
• How to propagate spathiphyllum 'mauna loa'
• Spathiphyllum 'Mauna Loa' growth rate & size
• Spathiphyllum 'Mauna Loa' cold hardiness
• Spathiphyllum 'Mauna Loa' temperature & humidity
• Is spathiphyllum 'mauna loa' toxic to cats & dogs?
• Is spathiphyllum 'mauna loa' toxic to cats?
• Is spathiphyllum 'mauna loa' toxic to dogs?

Featured in these plant shortlists

Spathiphyllum 'Mauna Loa' qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best low-light houseplants — Houseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best bathroom plants — Humidity-loving houseplants that also cope with lower light — suited to the steamy, often-dim conditions of a typical bathroom.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

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Spathiphyllum 'Mauna Loa' is also commonly called Mauna Loa peace lily or peace lily.

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