Prayer plants and other nighttime movers are just trying to fool you into thinking they're settling down for a good night's rest. Prayer plants have big, oval leaves that turn upward at night. The folding and unfolding of the leaves happens in a regular pattern. Plant biologists call these daily cycles circadian rhythms. The Green Prayer Plants are easy to grow. Just provide bright indirect light and keep evenly moist. Great houseplants! Light: Bright light.