Amazon Sword (Echinodorus bleheri) is a big, beautiful bright green for your planted tank. It requires a rich substrate (root nutrients). This plant is easy to grow, undemanding, and exquisite. A nutritious soil promotes growth, however the plant requires pruning to prevent it depriving plants beneath the light. Echinodorus bleheri does good even in poorly lit aquariums, because it grows towards the light.
It's a hardy and easy solitary plant for both novices and the extra skilled with quite huge aquariums.