Echinodorus 'Red Diamond' was bred in the Ukraine and is probably a cross between Echinodorus horemanni 'Red' and Echinodorus x barthii. The resultant hybrid is an attractive, relatively small plant with ruby-red sword-shaped leaves, 15-25 cm long.

Unlike many other sword plants, Echinodorus 'Red Diamond' remains moderate in size (20-30 cm wide rosette), so it is extremely well suited as a solitary plant, even in small aquariums. Increasing the nutrients in the substrate results in more abundant growth, while favourable light conditions promote the formation of the ruby-red leaves.