Amorphophallus maximus (maximum voodoo lily) care

Light

Amorphophallus maximus is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Bright, filtered light to light shade while the leaf is active; an east window or shade cloth. Strong direct sun scorches the thin, broad single leaf. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water amorphophallus maximus keep evenly moist in active growth, letting the surface dry slightly; withhold once the leaf dies back. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water freely while the leaf is up to feed the corm, never leaving it waterlogged. When the foliage yellows and collapses, dry the corm off and store warm and barely moist until the next cycle.

Soil and pot

Amorphophallus maximus grows best in fertile, sharply draining aroid or bulb mix. Use loam-based compost opened up with grit, perlite and bark. The large corm rots in cold, wet media, so prioritise drainage and a deep, generously drained pot. 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

Amorphophallus maximus sits happiest at around 50-70% humidity and 21-32°C (70-90°F). Moderate to high humidity keeps the leaf healthy. Warm-room humidity works in growth, but dry, hot air browns the leaflets. If you keep the room above 21 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 amorphophallus maximus sparingly. Feed every 2-3 weeks during active leaf growth with a balanced liquid fertiliser at half strength to bulk up the corm. Stop feeding once the leaf starts to die back into dormancy. 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 amorphophallus maximus in the Growli community. Each is annotated with the most common cause so you know where to start.

• Corm rot — Cold, wet or airless compost, especially in dormancy, rots the corm. Use a gritty free-draining mix and store the dormant corm warm and dryish.
• Leaf scorch — Hot direct sun bleaches and crisps the single leaf. Move to bright filtered light or light shade.
• Leaflet browning — Very dry air browns the leaflets. Raise humidity in growth and keep the plant away from heat sources.
• Failure to re-sprout — A cold or soggy dormant rest can abort the next shoot. Keep the resting corm around 20°C and only just moist until growth resumes.

Propagation

Propagate by separating offset cormlets during dormancy and potting them on, or from seed after flowering. Handle the corm with gloves, as the sap can irritate skin. 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

Amorphophallus maximus is toxic to pets. Amorphophallus maximus, like all members of the genus and the Araceae family, contains insoluble calcium oxalate raphides in corm, leaf and stem. The species is not individually listed by the ASPCA, but the ASPCA classifies directly-listed aroids (e.g. jack-in-the-pulpit, Arisaema) as toxic via insoluble calcium oxalates; treat it as toxic to cats and dogs. Chewing causes oral burning, intense drooling, swelling and vomiting. Keep away from pets and verify with a vet if ingested. 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.

Amorphophallus maximus deep-dive guides

Every aspect of amorphophallus maximus care, each with its own calibrated guide:

• Amorphophallus maximus watering schedule
• Amorphophallus maximus light requirements
• Best soil mix for amorphophallus maximus
• Amorphophallus maximus fertilizing guide
• When to repot amorphophallus maximus
• How to propagate amorphophallus maximus
• Amorphophallus maximus growth rate & size
• Amorphophallus maximus cold hardiness
• Amorphophallus maximus temperature & humidity
• Is amorphophallus maximus toxic to cats & dogs?
• Is amorphophallus maximus toxic to cats?
• Is amorphophallus maximus toxic to dogs?

Featured in these plant shortlists

Amorphophallus maximus qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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.
• 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Amorphophallus maximus is also commonly called maximum voodoo lily or giant amorphophallus.

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• All 5561 plant care guides in the Growli library