Calatheas and prayer plants (Calathea/Goeppertia, Maranta and their relatives) are grown for their spectacular patterned foliage, brushstroke greens, pink veins, and purple undersides. Many fold their leaves upward at night, a charming habit that earns them the "prayer plant" name. They have a reputation for being fussy, but once you understand their three priorities, gentle light, steady moisture, and clean water, they're very rewarding.
Light
Calatheas evolved on shaded rainforest floors, so they want medium, indirect light. Direct sun fades their patterns and scorches the leaves. An east window or a spot a few feet from a brighter window is ideal, if the markings look washed out, they're getting too much light.
Water
Aim to keep the soil lightly and evenly moist, never soggy, never bone dry. Here's the catch most people miss: calatheas are sensitive to the minerals and fluoride in tap water, which cause brown leaf edges. Use filtered, distilled, or rainwater, or let tap water sit out overnight before using it.
Humidity & temperature
This is where calatheas are demanding: they love high humidity (50%+). A humidifier is the most reliable fix; a pebble tray or grouping plants helps too. Keep them warm (65-80°F) and away from cold drafts and AC vents, which trigger crispy edges.
Soil & fertilizing
Use a rich but well-draining mix that holds some moisture without staying waterlogged. Feed lightly every 4-6 weeks in spring and summer with a diluted balanced fertilizer.
Common problems & fixes
- Crispy brown edges: low humidity or mineral build-up, raise humidity and switch to filtered water.
- Faded patterns: too much light, move to a shadier spot.
- Yellowing leaves: usually overwatering.
- Leaves not moving at night: normal variation; nothing to worry about.
Are calatheas pet safe?
Yes, calatheas and marantas are non-toxic to cats and dogs, which makes them a favorite for pet households. See more in our pet-friendly houseplants guide.
Shop Calatheas & prayer plants
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