Calathea are tropical plants known for their wide, colorful leaves. They thrive even in low light areas, making them great for even low light offices or bedrooms needing a pop of color. Their beautifully patterned leaves make them a very popular houseplant choice. Calathea leaves curling is a common problem many plant owners face, and can be due to several issues with the environment. If your calathea leaves are curling, continue reading to learn why and how your can fix it.