calathea house plant is a type of plant which is more popular as a decorative leaf than a flower. Their leaves are elaborate, striped and colored with bright green, purple, pink and silver. An interesting aspect is their nyctinasty movement, in which the leaves open in the daytime and close at night, like hands in prayer. The lower surfaces of leaves are usually a deep purple, which provides an additional visual interest. They are also not poisonous to pets thus making these plants a safe and appealing choice to the households with cats and dogs.