Calathea Leaf Movement: Normal Night Folding or Stress?

A calathea that lifts its leaves in the evening is behaving normally. The movement is one reason the family is called prayer plants. Most plants sold as calathea are now classified as Goeppertia, and they share this habit.

The RHS calathea guide calls it a nyctinastic habit. In daylight the leaves open flat. At night they flex upwards and together, as though in prayer.

What Normal Movement Looks Like

NC State Extension describes the pattern for several species. The foliage of Goeppertia makoyana folds up in the evening and reopens at sunrise. The Goeppertia roseopicta profile says the same, and both attribute it to changes in light and temperature.

Normal movement usually has these features:

• Leaves rise or fold as the room darkens.
• They reopen in the morning.
• The leaves stay firm and their color is unchanged.
• The mix is moist, not dry and not waterlogged.

You may also notice slow shifts during the day. Researchers who scanned two Calathea roseopicta plants indoors recorded leaf position changing through the day in natural light. In darkness the movements were smaller and followed a different pattern (Herrero-Huerta et al., 2018).

New leaves also emerge rolled. NC State notes that new G. makoyana leaves are rolled up as they grow, showing their pinkish-red undersides. A rolled new leaf is not a curling problem.

How the Movement Works

Each leaf has a pulvinus, a jointed swelling where the blade meets its stalk. A review of nyctinasty in legumes explains the mechanism. The pulvinus contains flexor and extensor motor cells, and the difference in turgor pressure between them bends the joint (Wang et al., 2023).

A study of Calathea lutea found that leaves both raised and folded about the pulvinus from early morning to noon. Raising the leaves significantly reduced the direct sunlight they intercepted (Herbert and Larsen, 1985). So a calathea can also lift its leaves in strong light, not only at dusk.

When Movement Signals Stress

The useful question is what the leaves do in daylight. Normal movement reverses. Stress responses persist or come with damage.

What you see by day	Likely direction	First check
Leaves rolled inward and limp	Water deficit	Is the mix dry deep in the pot?
Limp leaves over wet mix	Root problem	Are roots dark or mushy?
Rolled leaves with crisp brown edges	Dry air or dryness at the roots	Humidity and watering history
Rolling, bleaching and crisping in a hot, sunny spot	Heat or light stress	Direct sun or a heat source
Leaves held upright, firm and green	Normal movement	No action needed

UF/IFAS Extension lists wilted calathea leaves as a sign of drought stress or root pathogens. Its commercial guide advises keeping the mix uniformly moist but not wet, and checking roots for infection.

The RHS describes wilting, rolling, bleaching and crisping leaves as signs of heat stress. It also advises keeping calatheas out of direct sunlight.

What to Do

1. Observe for a full day. Look at midday and again after dark. Take a photo each time so you are comparing like with like.
2. Check the mix. Push a finger or a wooden skewer well below the surface. Water thoroughly if it is dry. Hold off if it is still wet.
3. Check the roots if leaves stay limp in wet mix. Firm, light roots are healthy. Dark, soft roots point to rot; see the calathea drooping guide.
4. Check the position. Move the plant out of direct sun and away from radiators and cold drafts. NC State recommends 18–24 °C (65–75 °F) for these species.
5. Check the air. NC State suggests humidity of about 60% for G. makoyana. A hygrometer tells you whether your room is close.

If the leaves curl rather than fold, the calathea curling leaves guide walks through the causes. The calathea hub links our other guides, and our calathea and prayer plant comparison covers the related Maranta.

References

• NC State Extension Gardener Plant Toolbox: Goeppertia makoyana
• NC State Extension Gardener Plant Toolbox: Goeppertia roseopicta
• RHS: How to grow calatheas
• Herbert TJ, Larsen PB (1985). Leaf movement in Calathea lutea (Marantaceae). Oecologia. PMID 28311317
• Herrero-Huerta M et al. (2018). Leaf movements of indoor plants monitored by terrestrial LiDAR. Front Plant Sci. PMID 29527217
• Wang M et al. (2023). Nyctinastic movement in legumes: developmental mechanisms, factors and biological significance. Plant Cell Environ. PMID 37614098
• UF/IFAS Extension: Cultural Guidelines for Commercial Production of Interiorscape Calathea (ENH1030)