If the soil feels dry or you forgot about your Prayer Plant for a couple of weeks, this is the most likely explanation for leaf curl. A thorough watering should help it return to normal.
What does it mean if my plant leaves are curling?
When leaves curl or ‘cup’ at the tips and the margins, the plant is trying to retain moisture. Any form of downwards curling usually indicates overwatering or overfeeding.
What does an Underwatered Prayer Plant look like?
Underwatering causes Prayer Plants’ leaves to droop
Whilst your Prayer Plant can tolerate the occasional missed watering, over time if it doesn’t receive enough water then the plant will droop, turn brown/yellow and lose leaves.
Do Prayer Plants curl up at night?
As such, during the day, the plant leaves will lower or spread out to absorb moisture or catch rain. At night, this adapted behavior helps the plant retain water by folding leaves inwards— that way any water droplets can be stored as they trickle down to the plant instead of evaporating.