Lobelia Cardinalis ‘Small Form’
Lobelia Cardinalis is a great plant for any aquarium. In this plant’s larger form, it is used for ponds, where it produces pretty red flowers. However, a smaller form has been developed in cultivation and it makes a nice aquarium plant. Lobelia cardinalis grows better with supplemental CO2 and good lighting, but it can also be maintained in a less robust form in a “low tech” tank. When you first purchase the cardinal plant, the leaves will appear a dark olive color with a maroon underside. Once it’s in your tank, the leaves will appear smaller and a bright light green.