Houseplant · Marantaceae

Calathea Medallion

Goeppertia roseopicta

Supply soft water, warmth, and steady humidity, and the medallion leaves open to their full painted pattern.

Light

Bright indirect

Warmth

61–⁠75°F · 16–⁠24°C

Hardiness

USDA 11–⁠12

Mature size

12–⁠18 in · 30–⁠46 cm

Pet-safe
Calathea Medallion

Overview

The Calathea Medallion takes its name from broad rounded leaves that read as hand-painted, lime-green feathering over a darker ground above a deep burgundy underside. It is a member of the prayer plant family, native to the South American rainforests, where it occupies the warm, shaded stratum below the canopy. Each evening the leaves rise and fold like clasped hands, a circadian movement known as nyctinasty.

This is a plant for the attentive grower. Its demanding rating is earned: it requires warmth, consistent moisture, high humidity, and water stripped of the fluoride and chlorine present in most tap supplies. Meet those conditions and the foliage stays full and deeply colored. Fall short and it signals quickly, most often with brown, crispy leaf margins.

It remains compact, reaching about knee height, and its slow rate of growth suits a shelf, a desk, or a humid bathroom with adequate light. Keep it clear of direct sun, which scorches the leaves and fades the pattern. Sited correctly, it returns foliage that few other houseplants rival.

Care

The short version: bright indirect light and never direct sun, with the soil held evenly moist using distilled water or rainwater. Maintain humidity above 60%, keep it warm, and feed monthly through spring and summer.

Light

Provide bright, indirect light and keep it out of direct sun, which scorches the leaves and bleaches the pattern. It withstands partial to full shade better than most foliage plants, though insufficient light flattens the color. Position it near a bright window behind a sheer curtain.

Water

Hold the soil evenly moist but never soggy through active growth, then reduce watering to keep it just damp over winter dormancy. Water quality matters more, because the plant registers the fluoride and chlorine in tap water as brown tips. Use distilled water or rainwater in their place.

Soil

Pot it in a well-drained, peaty mix high in organic matter, with vermiculite or perlite incorporated for drainage. A pH between 6.0 and 7.0, slightly acidic to neutral, suits its needs. The medium should retain moisture yet never sit waterlogged.

Temperature

Keep it warm, between 61°F and 75°F (16°C to 24°C). It has no cold tolerance and needs a constant minimum of at least 61°F (16°C) year round, kept well clear of draughts, open windows, and cold glass.

Humidity

The plant needs humidity above 60% and registers dry air with crisp leaf margins. Cluster it with other plants, stand it on a pebble tray, or run a humidifier. A bright bathroom often supplies exactly the conditions it prefers.

Feeding

Apply a balanced liquid fertilizer monthly through spring and summer while the plant is in active growth, and suspend it over the winter rest. Feed lightly rather than heavily, since residual salts accumulate in the soil and compound the brown-tip problem.

Pruning

No routine pruning is required. Simply remove old leaves at the base as they yellow or brown, which keeps the plant clean and redirects its energy into new growth. Trimming a browned tip back to a thin margin is acceptable for appearance.

Repotting

Repot every 1 to 2 years in spring, or earlier if roots circle the pot or push through the drainage holes, moving up a single pot size. This is the right moment to divide the clump if you want additional plants. Treat slowed growth or rapid drying as evidence it has outgrown its container.

Size & spacing

It stays small, reaching roughly 12 to 18 inches (30 to 46 cm) in height with a spread of 9 to 12 inches (23 to 30 cm). Its slow, compact habit makes it simple to place on a shelf or desk without ever crowding the space.

Troubleshooting

Nearly every calathea fault registers first on the leaves, and most trace to water, light, or humidity. Catch the early signs and you can correct the cause before it spreads. Match the symptom below, then adjust the condition that produced it.

Severe

Wilting and yellowing above a softened, rotting base

Soil that stays waterlogged starves the roots of oxygen, root rot follows, and the plant wilts even though the mix is plainly wet. Lift it from the pot and inspect the roots; healthy ones are firm and pale, while rotted ones turn brown and soft. Cut away the dead roots, repot into fresh well-drained mix in a container with drainage holes, and scale back your watering.

Fix:

  • Stop watering and let the medium drain
  • Unpot, trim away soft rotted roots, and repot into fresh well-drained mix
  • Use a pot with drainage holes and water only when appropriate
Setback

Stippling and fine webs on the leaf undersides

Hot, dry air is the condition spider mites thrive in, and they colonize the undersides of leaves where they feed and spin a faint webbing. Their feeding punctures show up as fine yellow stippling, easiest to see when a leaf is held to the light. Rinse the foliage, push the humidity up, and apply insecticidal soap or horticultural oil while keeping the plant isolated until the population is cleared.

Fix:

  • Rinse foliage and increase humidity
  • Treat with insecticidal soap or horticultural oil, repeating as directed
  • Isolate affected plant to limit spread
Cosmetic

Marginal browning and crisping at the leaf tips

The defining grievance of the genus. Fluoride and chlorine carried in tap water concentrate in the leaf margins as the plant transpires, and that mineral load burns the tissue from the edge inward. Dry air speeds the loss of moisture, and salts from heavy feeding pile on. Move to distilled water or rainwater, hold humidity above 60%, and periodically flush the pot to leach the accumulated salts.

Fix:

  • Switch to distilled water or rainwater
  • Raise humidity above 60% with a pebble tray, humidifier, or regular misting
  • Flush the soil periodically to leach out accumulated salts and avoid over-fertilizing
  • Trim off badly browned tips for appearance
Cosmetic

Bleached, washed-out patches on sun-facing leaves

Direct sun delivers more radiation than the foliage can dissipate, and the result is leaf scorch alongside a washed-out medallion pattern. Expect the damage on whichever leaves face the strongest light, with hard afternoon sun the worst offender. Relocate to bright indirect light or partial shade, or temper a sunny window with a sheer curtain.

Fix:

  • Move to a spot with bright indirect light or partial to full shade
  • Avoid direct sun, particularly afternoon sun
  • Filter strong light with a sheer curtain
Cosmetic

Discrete leaf spots and blotches on the foliage

Defined spots and blotches indicate leaf spot disease, which establishes when foliage stays wet and the surrounding air is too still for it to dry. Direct your water to the soil rather than the leaves, open up the space around the plant so air moves freely, and strip off the marked leaves.

Fix:

  • Avoid wetting the foliage when watering
  • Improve air circulation
  • Remove affected leaves

Toxicity

Reassuring news for pet owners: the Calathea Medallion is safe. The ASPCA records Calathea and the prayer plant as non-toxic to cats, dogs, and horses, with no toxic compounds identified. A pet that chews a leaf may have a mild, passing stomach upset from the roughage, as with any houseplant, but nothing here will poison an animal or a child.

Safe for

People · Cats · Dogs · Horses · Rabbits · Livestock · Birds

Cats None

No toxic principles are on record, so it is safe for cats. A leaf-chewing cat may feel briefly queasy from the indigestible roughage, and nothing beyond that.

Dogs None

Cleared for dogs by the ASPCA. A dog can chew the foliage without harm, though swallowing a large amount may bring a brief, mild stomach upset.

Horses None

Recorded as non-toxic to horses, so grazing on it carries no risk of poisoning.

Rabbits None

The leaves hold nothing poisonous to rabbits. Limit it to an occasional nibble, since a rabbit's digestion is suited to its regular hay and greens.

Livestock None

Grazing animals such as goats and sheep face no toxic compounds here, though as a tender tropical it seldom comes within their reach.

Birds None

No toxins for birds are known in the foliage, so a pet bird that perches or pecks among the leaves is at no risk.

People None

Safe to keep near children. It is not an edible plant, but a leaf in a small mouth will not cause poisoning.

As with any plant, ingestion of large amounts of foliage may cause mild, transient gastrointestinal upset that is not due to toxicity

Varieties

The Medallion label spans more than one species along with several colorful relatives in the same group. These are the plants you are likely to meet under that name.

Goeppertia veitchiana 'Medallion' (syn. Calathea veitchiana; 'Medaillon')

What the trade usually sells as Calathea Medallion is recorded by NC State and the RHS as Goeppertia veitchiana, recognizable by its large rounded medallion leaves marked lime-green and creamy-white above over a deep burgundy underside.

Goeppertia roseopicta 'Medallion'

NC State Extension documents a distinct Medallion selection within Goeppertia roseopicta, this one bearing silver-striped dark green upper leaves above purple undersides.

'Dottie'

A roseopicta selection identified by a pink central vein that feathers outward across nearly black foliage.

'Rosy'

A roseopicta selection showing bright pink leaf centers ringed by a narrow green border.

How to propagate

Only one method will give you a new Calathea Medallion, and it is dependable once you understand what the plant can and cannot do.

DivisionModerate

Late spring, typically at repotting during active growth · Several weeks to a few months for new divisions to root and resume growth

Division is the sole means of increasing this plant, because it forms no viable propagules from stem or leaf cuttings. Carry it out in late spring during active growth, generally at repotting, separating the rhizome clump into sections that each retain their own roots and shoots. Expect the divisions to take anywhere from several weeks to a few months to root in and resume growth, so give them time.

Myths

Myth

Like most tropical foliage, calatheas and the prayer plant carry toxins dangerous to animals.

Reality

This confuses calatheas with the genuinely hazardous tropicals they sit beside on the shelf. The ASPCA records both Calathea and the Prayer Plant as non-toxic to cats, dogs, and horses. You can keep this plant in a home with pets without worry.

Myth

Calathea Medallion is correctly classified within the genus Calathea.

Reality

Most species formerly classed as Calathea, roseopicta and veitchiana among them, have been reassigned to the genus Goeppertia. Kew gives the accepted name as Goeppertia roseopicta, retaining Calathea roseopicta only as a synonym, so the older name survives in horticulture rather than in current botany.

Myth

Tap water is fine for a Calathea.

Reality

Calatheas and the wider prayer plant group respond poorly to the fluoride and chlorine in most tap water, registering the damage as brown tips and margins. Distilled water or rainwater keeps the foliage clean, and that single substitution resolves the majority of leaf-tip browning.

Sources