Alternanthera Reineckii

Plant Profile

Alternanthera Reineckii, known in the hobby simply as AR, is a classic aquatic stem plant that's been putting red stem plants to shame with how easy it is to keep colorful. Beginners and experienced aquascapers alike reach for this one because it holds rich ruby-red and magenta coloration far more reliably than other red stem plants, no complicated dosing schedule required. Broad, lanceolate leaves grow in opposing pairs along sturdy stems reaching 4 to 12 inches tall, making it a natural midground centerpiece or background hedge for anyone who wants bold color contrast in their freshwater aquarium without the usual red-plant headache.

*Form Notice: Photos display this plant in both its emersed (above-water) and submerged forms. Depending on nursery availability and seasonality, you may receive this plant in either form. Learn more about what to expect by reading our guide on Emersed vs. Submerged-Grown Aquatic Plants.

Key Features & Benefits

• Vibrant ruby-red and magenta foliage introduces bold color contrast.
• Beginner-friendly red stem choice that maintains rich coloration more easily than traditional high-demand red plants.
• Dense foliage shelters dwarf shrimp and shy fish.

Care & Planting Instructions

• Remove lead weight (or pot) and remove cotton wrap (or foam) surrounding the roots, then strip lower foliage so bare stems anchor cleanly into soil without rotting.
• Use fine-tip pinsettes to push individual stems 1 to 2 inches into nutrient-rich substrate, spacing them slightly apart so light reaches lower foliage.
• Provide medium-to-high lighting and quality aquarium soil; regular dosing of liquid fertilizers like UNS Plant Food to maintain healthy nitrate and phosphate levels alongside pressurized CO2 injection will prevent dull orange fading and speed up growth. See our guide to growing red aquarium plants.
• Maintain stable water parameters and avoid sudden environmental shifts to prevent leaf melt or stem rotting.
• Trim main stem tops with straight scissors once stems reach the desired height, and replant trimmings directly into substrate to propagate and expand coverage. Read our trimming & propagation guide for details.

Quick Facts

Listed information should be treated as general guidelines only. Team Buce Plant encourages you to do thorough research to ensure healthy growth!

Frequently Asked Questions

1. Why are the lower leaves falling off my stem plants?

Lower leaf loss (leggy stems) usually occurs when lighting cannot reach the bottom of the plant due to overcrowding or shading from larger plants. Spacing individual stems slightly apart during initial planting and maintaining strong light penetration will keep lower leaves healthy.

2. Why are the leaves on my Alternanthera Reineckii dulling to an orange color?

While Alternanthera Reineckii is easier to keep colorful than other red stems, leaves fading or dulling to a muted orange usually indicate insufficient lighting, low nitrates, or a lack of macro nutrients. Regular dosing with liquid fertilizers like UNS Plant Food restores deep red and magenta tones.

3. How do I transition Alternanthera Reineckii from emersed to submerged growth?

When transitioning from emersed to submerged growth, plant bare stems securely into rich substrate under good lighting and keep water parameters stable. As new growth adapts, the plant will shed its stiffer land leaves and sprout vibrant, rich red underwater foliage. Once new shoots take root, trim away old lower growth to encourage dense branching.