Calathea

Goeppertia · Prayer Plant

It grows on the shaded, humid floor of tropical American rainforests, under a closed canopy. Its painted leaves sit on tiny hinges and physically rise and fold every night, then open again at dawn.

Tricky to keep Pet safe Wants humidity

Family

Marantaceae

Origin

Tropical Americas

In the wild

Leaves move at night

Indoors

0.3–0.6 m

Growth

Moderate

With pets

Safe

Where it's from

A deep-shade understory plant from warm, wet rainforest floor under a closed canopy.

Tropical Central and South America

Calathea in the wild — Growing wild on the shaded rainforest floor, in the dappled light beneath taller trees.Dr. Alexey Yakovlev

Rainforest understory

Native chiefly to Brazil and the broader Neotropics, on shaded, consistently moist forest floor.

Outdoors: zones 11–12

True tropical. Frost kills it, so almost everywhere it lives indoors.

Quietly vanishing

Many narrow-range wild relatives are threatened even as the houseplant thrives by the million.

It moves every night

You are not buying a static plant.

Each leaf sits on a tiny hinge-joint called the pulvinus, and physically rises to fold upward at night, then lowers and opens by day. This daily clock is called nyctinasty, and it is why the plant is called a prayer plant: at dusk the leaves close like praying hands.

A daily rhythm

The leaves change pose roughly every twelve hours, driven by water pumped in and out of the hinge.

Painted, not flowered

It rarely blooms indoors. The whole show is the leaf, in peacock, zebra, pinstripe and rose-painted patterns.

It got renamed

Molecular work moved most trade Calatheas into the resurrected genus Goeppertia, though nurseries still say Calathea.

How to keep it

The diva. Forgiving of nothing about dry air or hard water, and the browning starts at the first sign of either.

LightBright, indirect

To part or full shade. Direct sun scorches and fades the patterns; too little light dulls the colour.

WaterKeep evenly moist

Never soggy, never bone-dry. Sensitive to fluoride, chlorine and hard-water minerals; use filtered or rainwater.

HumidityHighThe core demand. 50 to 60% or more. Dry air gives it crispy brown edges; a humidifier beats misting.

Temperature18–24°CWarm and draft-free, away from cold windows.

SoilRich, peaty mixOrganic and moisture-retentive, but still well-draining.

FeedingLight, in growing seasonA balanced feed at reduced strength through spring and summer. Over-feeding burns the tips.

DifficultyModerate to hardThe genus's reputation. White Fusion is notoriously finicky.

With petsNon-toxicListed safe for cats, dogs and horses by the ASPCA. A genuinely pet-safe decorative foliage plant.

PropagationDivisionNo vining stem to cut. Split the rhizome clump at repotting, each section with roots and leaves.

RepottingEvery 1–2 yearsIn spring, or when root-bound. Refresh the mix and divide if desired.

What the data says

The numbers behind the painted, praying plant.

What it costs

Common species are mass-produced; a small collector layer pays for difficulty and looks, not scarcity.

$15–40

Common species

Rattlesnake, medallion, ornata and zebra, in every box store.

$30–80

White Fusion

Prized white, green and lavender marbling, and the hardest to keep alive.

$15–40Common species

$30–80White Fusion

There is no four-figure speculative mania here. The premium is paid for fussiness, not rarity.

The clean-air myth

Calathea gets swept into air-purifying lists on the back of NASA's 1989 sealed-chamber study.

100–1,000

plants per square metre would be needed to rival a building's ventilation (Cummings and Waring, 2019). In a real room, opening a window clears VOCs far faster. Buy it for the praying leaves.

IUCN · Mostly unassessed

In the wild

The cultivated species thrive while narrow-range wild relatives slip away.

Several Ecuadorian and Andean endemics are imperilled: G. dodsonii and G. petersenii are Critically Endangered, G. libbyana Endangered. Their cloud-forest habitat is being cleared even as the common species sell by the million. Thriving in our homes, vanishing in the wild.

When it sulks

What the symptom is telling you.

Brown, crispy edgesThe classic complaint: low humidity, or hard, fluoridated or chlorinated tap water. Switch to filtered or rainwater.

Curling leavesUnderwatering or low humidity. The leaves curl to conserve moisture.

Yellowing leavesOverwatering and soggy roots, or old leaves ageing out.

Faded patternsToo much direct sun, which scorches and bleaches the colour.

Spider mitesThey love the dry air it hates. Raise humidity and treat early.

Varieties & company

The varieties

MedallionRattlesnakeOrbifoliaPinstripeWhite Fusion

Pairs with · keep apart from

Prayer PlantFernsPeace LilySnake PlantZZ PlantCacti