Calathea

The prayer plants: a group of tropical American foliage plants grown for boldly patterned, painted leaves that rise and fold at night. Most of the plants sold as Calathea now sit in the genus Goeppertia, but they share one care rhythm. They ask for warmth, humidity and clean water, and they reward it. This guide covers the group; the standout species get their own cards.

Care at a glance

Origin & history

Prayer plants, not aroids. Calathea and its relatives belong to the arrowroot family, Marantaceae, not to the aroids most houseplants come from. They are native to the tropical forests of the Americas, from Mexico through Central America and the Caribbean to Brazil, the center of their diversity (Plants of the World Online, n.d.). The draw is the foliage: leaves painted in silver, cream, pink and deep green, often with wine-purple undersides.

The name change. Most of the plants the trade still sells as Calathea were moved into a separate genus, Goeppertia, after genetic work showed they belonged there, so Calathea orbifolia is now Goeppertia orbifolia, and so on. Both names circulate, the care is identical, and this guide treats them as one group and notes current names on the cards.

Why they “pray.” Each leaf rises and folds upward at night and lowers again by day, driven by a small joint at the base of the leaf. That nightly movement, called nyctinasty, is what gives the whole family its common name, and a plant that folds well at night is usually a happy, well-watered one.

Care in depth

Light. These are understory plants from the forest floor, built for dappled shade. Bright, indirect light keeps the leaf pattern crisp; direct sun scorches the leaves and washes out the color, while deep shade dulls the markings and slows growth. An east window, or a few feet back from a brighter one, is ideal.

Water. This is the make-or-break. Keep the mix evenly moist, never bone-dry and never soggy, and let the excess drain away. Just as important is what you water with: tap-water fluoride and dissolved salts brown the leaf tips and edges, so use distilled water or rainwater where you can (North Carolina State Extension, n.d.). Consistency matters more than volume.

Humidity and warmth. Aim for humidity of 60 percent or more and steady warmth of 65 to 75°F (18–24°C), and keep the plant above about 60°F (16°C) and away from cold drafts. Dry indoor air is the usual cause of crisping edges and curling leaves; a humidifier is the most reliable fix. Steadiness in every variable is the theme.

Common problems & pests

What you see	Likely cause	What to do
Brown, crisp leaf edges	Tap-water minerals or dry air	Distilled or rainwater; raise humidity to 60%+.
Curling or limp leaves	Too dry, or air too dry	Water evenly; add humidity.
Yellowing leaves, soft base	Overwatering or poor drainage	Ease off; improve drainage; check roots.
Faded, washed-out pattern	Too much direct sun	Move to bright, indirect light.
Fine webbing, stippling	Spider mites (dry air)	Rinse; raise humidity; insecticidal soap.

In this genus

Each plant inherits the genus care above; the note is only what differs.