Pseudodracontium lacourii (Lacoeur's pseudodracontium) care

Light

Bright but filtered. Pseudodracontium lacourii burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright, filtered light or dappled shade mimics its forest-floor habitat. Avoid harsh direct sun, which scorches the large divided leaf; too little light gives weak, etiolated growth. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering pseudodracontium lacourii: keep evenly moist in active growth, watering when the top 2-3 cm dries; keep nearly dry while the tuber is dormant. 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. As a tropical geophyte it wants steady moisture and warmth while in leaf, then a distinct drier rest once the leaf collapses. Wet dormant tubers rot quickly.

Soil and pot

Pseudodracontium lacourii grows best in rich, free-draining humus mix. A fertile, organic, sharply drained medium — loam with leaf mould, compost and grit or perlite — suits the tuber. Drainage prevents rot while the organic matter feeds vigorous seasonal growth. 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

Pseudodracontium lacourii sits happiest at around 60-80% humidity and 18-29°C (64-84°F). High humidity matches its tropical origin. In dry rooms raise humidity with grouping, a tray or a humid greenhouse corner; low humidity browns the fine leaf segments. 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 pseudodracontium lacourii sparingly. Feed every 2-4 weeks through active growth with a balanced liquid fertiliser at half to full strength to support the large leaf and bulk up the tuber. Stop feeding entirely during 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 pseudodracontium lacourii in the Growli community. Each is annotated with the most common cause so you know where to start.

• Tuber rot in dormancy — Watering the resting tuber is the main killer. Once the leaf collapses, keep the medium nearly dry and warm until new growth emerges.
• Leaf scorch and edge browning — Direct sun or dry air damages the fine leaf segments. Provide bright filtered light and high humidity.
• Dormancy mistaken for death — The single leaf dies down completely each cycle, which alarms growers. The tuber is alive — hold it warm and barely moist and it will reshoot.
• Cold damage — Frost-tender and chill-sensitive; temperatures near or below 10°C harm the tuber. Keep it warm year-round, especially during dormancy.

Propagation

Separate tuber offsets during dormancy, or sow fresh seed where flowering produces it. Offsets are the reliable route; seed-raised plants take several years to reach flowering size. 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

Pseudodracontium lacourii is toxic to pets. Not individually listed by the ASPCA, but Pseudodracontium is an Araceae genus (close to Amorphophallus) whose tissues contain insoluble calcium oxalate raphides — the same toxic principle ASPCA cites for listed aroids. Treat as toxic to cats and dogs: chewing causes oral burning, drooling, swelling and vomiting. Keep away from pets and verify with a vet on any exposure. 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.

Pseudodracontium lacourii deep-dive guides

Every aspect of pseudodracontium lacourii care, each with its own calibrated guide:

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

Featured in these plant shortlists

Pseudodracontium lacourii 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

Pseudodracontium lacourii is also commonly called Lacoeur's pseudodracontium or African giant arum.

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