In short
- Site: filtered light (east or a shaded south window), NEVER direct sun — leaves fade and scorch.
- Air humidity >60% — humidifier, misting, water tray. This is the MOST important requirement.
- Watering: SOFT water (rainwater, boiled or stood) — hard water causes brown edges.
- Non-toxic — safe in a household with cats or dogs (ASPCA database).
- Does not tolerate cold draughts or sudden temperature changes — minimum 16°C.
- Large-leaved, up to 30 cm across — needs space to spread its leaves.
Botanical data
- Family
- Marantaceae (Marantaceae)
- Height
- 0.6–1 m
- Width
- 0.6–1 m
- Habit
- Clump-forming
- Growth rate
- Moderate
- Position
- Partial shade, Shade
- Soil
- Humus-rich
- pH reaction
- pH 6–7
- Moisture
- Moist
- Bloom
- June–August
- Hardiness
- USDA 11a–11b
- Propagation
- By division
Characteristics
A perennial with a rhizomatous rootstock, forming a dense clump 60–100 cm tall and wide. Long-stalked leaves reaching 30 cm across — round to slightly heart-shaped, peltate. The upper leaf surface is pale to silvery pale-green with distinct darker green stripes along the veins — giving a painted-leaf effect. The underside is intensely green-silvery. The blade is fairly thick and glossy. The leaves display NASTIC movement — in the evening they rise and fold up like praying hands (hence the English family name prayer plants), and in the morning they spread horizontally again. Flowers are small, white and inconspicuous, borne in cone-like inflorescences — they rarely appear in cultivation and are usually removed to save the plant's energy. It does not produce runners — it spreads via its rhizome.
Growing and care
Watering
Water with SOFT, stood water at room temperature or rainwater — hard tap water (fluoride, chlorine, calcium) causes brown edges. The substrate should stay evenly lightly moist, but not sodden. Requires high air humidity (>60%) — misting, humidifier or a water tray.
Fertilizing
Dose CLEARLY reduced — 1/4 or 1/2 of the label recommendation. Calatheas are sensitive to substrate salinity; excess fertiliser causes brown leaf edges.
Planting
Light, airy substrate for tropical plants: peat, coco, perlite, pine bark and pumice. A ready-made aroid or orchid mix combined 1:1 with peat will also do. Pot wide and shallower than tall, with many drainage holes. Repot every 2 years in spring.
Pruning
Remove withered or brown leaves at the base with a sharp, clean tool. Flowers (small, inconspicuous) can be cut off after they fade so the plant doesn't waste energy on them.
Companion plants
Good companions
Both plants require high air humidity and a place in filtered light — keeping them close together creates a microclimate of higher humidity.
Bad companions
They require opposite conditions — succulents need full sun and dry air, calathea filtered light and high humidity. A shared site harms both.
The evidence level indicates whether the relationship is backed by research, observation, or gardening tradition.
Toxicity
| For whom | Level | Notes |
|---|---|---|
| Humans | None | — |
| Dogs | None | Non-toxic to pets — one of the few popular striking houseplants safe in a household with a dog or cat (per the ASPCA database). |
| Cats | None | — |
History and origin
The genus Calathea was defined in 1822, but in 2012 F. Borchsenius and colleagues split it on the basis of molecular data — most ornamental species (including orbifolia) were moved to the genus Goeppertia (the name commemorates the German botanist Heinrich Göppert, 19th c.). The name Calathea orbifolia persists in trade and horticultural literature to this day. The species comes from Bolivia and was botanically described as early as the 19th century, but its mass popularity in houseplant collections began after 2015, largely thanks to social media (Instagram, Pinterest) — today it is one of the most photographed houseplants in the world.
Uses
Exclusively as a houseplant in a home or a glazed conservatory. It looks great as a specimen in a large floor pot or as part of an arrangement with other tropical plants requiring the same humidity (monstera, ficus, philodendron). Suitable for bathrooms with a window — the high humidity there suits the plant perfectly. NOT suitable for a balcony (even shaded) — the too-dry air and temperature swings of temperate weather quickly lead to brown leaf edges.
Trivia
- The family Marantaceae has a nyctinastic trait: leaves fold upward at night, resembling clasped praying hands — hence the English name prayer plants.
- The leaf movement is driven by turgor changes in a specialised structure at the base of the petiole called a pulvinus — it responds to the light–dark cycle.
- The genus name Goeppertia honours Heinrich Göppert (1800–1884), a German botanist and palaeobotanist from Wrocław — a pioneer of plant-fossil studies.
- orbifolia means with round leaves (Latin orbis — circle + folium — leaf) and distinguishes this species among calatheas, which usually have oblong leaves.
Frequently asked questions
Why are the edges of my calathea's leaves turning brown?
This is the most common cultivation problem — three main causes: (1) HARD tap water (fluoride, chlorine, calcium) — switch to rainwater or water stood for at least 24 hours; (2) too low air humidity (<50%) — add a humidifier, a tray of damp expanded clay under the pot, frequent misting; (3) over-fertilising and salt build-up — flush thoroughly with soft water, cut the fertiliser dose to 1/4.
Is round-leaf calathea safe for cats and dogs?
Yes — the ENTIRE Marantaceae family, including Goeppertia orbifolia, is non-toxic to pets (confirmed by the ASPCA toxicological database). It is one of the few striking, popular houseplants that is safe in a household with a cat or dog — alongside e.g. fittonia, striped calathea and pilea.
How to propagate round-leaf calathea?
Only by DIVIDING the clump in spring (III–IV), when repotting. Remove the plant from its pot, gently divide the rhizome with a sharp, clean knife into 2–3 pieces — each must have its own roots and at least 2–3 healthy leaves. Plant the sections into fresh, moist substrate and keep them in high humidity (a plastic bag or a mini-greenhouse) for 4–6 weeks. Leaf or stem cuttings do NOT work — calathea can only be propagated from the rhizome.
Sources
- Plants of the World Online (POWO) — Goeppertia orbifoliaDatabase (GBIF, POWO…)
- ASPCA — Toxic and Non-Toxic Plants (Calathea)Institution / botanical garden
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