Lobelia Cardinalis - Live Aquarium Freshwater Plants Java Moss Fern Anubias ADA Lobelia Cardinalis is a very attractive small plant. When Lobelia Cardinalis grows emerse , they will have stunning "dark purple" color, this color will turn in to bright green when they are fully submerse. Lobelia Cardinalis will grows well even medium light and without CO2. High lighting, and CO2 will make the plants bigger, and strong stems. Its unique appearance and growth habit makes it an ideal middleground plant. It can even be used as easy-to-care-for foreground plant in large aquarium. FREE Expedited Shipping