Terrariums require regular or occasional watering which is dependent on the type of plant being cultivated and its requirements. They also need to be exposed to bright but indirect sunlight and care should be taken to avoid them being exposed to direct sunlight as their leaves could get scorched. Terrariums also require a well-draining soil rich in humus and occasional pruning for maintenance and to cut off diseased part of the plant or pest ridden parts to avoid possible spread to other parts of the plant.