The Marble Queen Sword (Echinodorus corifolius) is a hardy plant that is easy to grow in a variety of conditions. The Marble Queen Sword is identifiable by its large leaves with beautiful marbled greens. Like other sword plants, the Marble Queen Sword has the potential to grow large (up to 24 inches) and is most often used in mid- and background planting. They are relatively easy to propagate as they grow, as they reproduce with rhizome structure and side shoots. While they will benefit from CO2 supplements, they can thrive in even low-tech settings with high light and nutrient-rich substrate.