Ammannia crassicaulis

Ammannia crassicaulis is a striking African stem plant admired for its warm red-brown to cognac colouring and tall, upright growth. When given strong lighting and CO₂, it develops vibrant tones that make it a standout in any aquascape. Its naturally yellow-green stems contrast beautifully with the rich red leaves, creating a dynamic visual effect in medium to large planted tanks.

Appearance & Origin

Native to Africa, Ammannia crassicaulis typically grows between 30–50 cm tall and spreads about 8–15 cm wide. In the aquarium, it displays a captivating colour palette, with the leaves shifting from red-brown to deep cognac under ideal lighting conditions. Its stems retain a distinctive yellow-green hue that enhances the plant’s overall visual appeal. This species prefers soft, slightly acidic water, where its colours develop more intensely and growth becomes more predictable.

How to Use in the Aquarium

Thanks to its height and bold tones, Ammannia crassicaulis is most effective as a background plant, where its rich colouration can rise behind midground greenery and bring depth to the layout. It is especially popular in Dutch-style aquascapes, where strong colour variation is desired. To achieve the best results, ensure that the lower leaves receive adequate light—if shadowed for long periods, they can die back. Providing ample spacing between stems encourages fuller growth and maintains a healthy appearance from base to tip.

Maintenance

This species is considered medium difficulty, largely due to its need for consistent lighting and CO₂ supplementation. It grows at a moderate pace, making it manageable but still requiring regular trimming to maintain shape and prevent shading. Ammannia crassicaulis propagates easily: side shoots or stem cuttings can simply be replanted into the substrate, where they quickly form new roots. Keeping water soft and slightly acidic, alongside providing strong light, helps the plant achieve its best colouration and overall health.

Ammannia crassicaulis is a dramatic, colourful stem plant perfect for aquarists seeking a vibrant focal point in their aquarium. With proper lighting, CO₂, and spacing, it rewards hobbyists with rich red tones, elegant vertical structure, and steady, reliable growth. Whether used in a Dutch-style layout or as a bold accent in a nature aquarium, it brings warmth, depth, and character to any aquascape.

Ammannia crassicaulis Growth Information