A terrarium is a closed container set up to provide a controlled environment for plants and animals. Plants that work well in a terrarium are those that usually do well in low-light and warm, humid conditions because a terrarium tends to be warm and humid. Low-lying plants also thrive in a terrarium environment.
The Cast-iron Plant (Aspidistra elatior) thrives in low-light or shade conditions, which makes it a good terrarium plant. The leaves are large, can grow up to 20 inches tall, and are deep green and leathery. The plant's fruit and flowers grow at ground level in the spring. The plant's fruit and flowers grow at ground level in the spring. The cast-iron plant grows in clusters together and can spread quickly. They prefer moist, fertile, well-drained soils.
Arrowhead plant (Sagittaria spp.) is also called the bull tongue. It is a perennial plant that grows from 1 foot tall to more than 4 feet tall. It works well as a terrarium plant because it grows to fit the container. It is an aquatic plant that prefers moist conditions and can grow submerged in water. The leaves are arrowhead shaped and the flowers are light pink, tiny and grow in clusters.
Pothos (Epipremnum aureum) is also known as the Devil's ivy. It is an evergreen, perennial vine that usually does not grow taller than 18 inches. It can spread indefinitely. It is a foliage plant that does not flower. It is an easy-growing plant that requires very little care and adapts well to nearly any condition except for direct sunlight or complete darkness. This makes it a good terrarium plant. The vines can be trimmed back to the desired size when they begin growing.
Watermelon begonia (Pellionia daveauana) is an evergreen perennial plant that grows up to 4 inches tall. It can spread quickly and indefinitely. These plants are grown frequently in greenhouses and terrariums. The plant is grown for its large foliage, which has gray-green centers with purple edges. The watermelon begonia tolerates low-light conditions but prefers a warm climate and moist soils.