Alternanthera reineckii (Cardinalis)

Alternanthera reineckii, commonly known as Parrot Leaf, is a striking aquarium plant valued for its vibrant red leaves. This stem plant, native to South America, features lanceolate leaves with a distinctive waviness along the edges. The upper leaf surface displays shades ranging from olive green to reddish-brown, while the underside varies from light brown to reddish-brown. Under optimal conditions, the plant can reach heights of up to 50 cm, making it suitable for mid to background placement in aquariums. Alternanthera reineckii thrives in the slow-flowing waters of the Amazon and adapts well to various habitats. Bright lighting, nutrient-rich substrates, and occasional CO₂ additions are beneficial for healthy growth. Regular fertilization with iron and micronutrients is also recommended. The plant flourishes in water temperatures between 23 and 30°C and a pH level of 6.2 to 7.1. Pruning encourages bushy growth. In Dutch aquascaping layouts, Alternanthera reineckii is often used to create vibrant contrasts with green plants and a dynamic underwater aesthetic.