Description
Plant Profile
Alternanthera Lilacina is a stunning, color-rich variant of the popular Alternanthera reineckii species native to Central and South America. Famous for its striking reddish-purple stems and deep purple-to-ruby leaf undersides, this variety features distinctly narrower and longer leaves than standard AR varieties. When grown under strong lighting and optimal nutrient levels, new leaf shoots produce brilliant pink and red hues that offer an incredible change of pace from traditional green aquascapes, making it an ideal midground or background focal point.
*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
Striking magenta, purple, and deep ruby leaf undersides deliver rich color contrast in midground and background placements.
Narrower, elongated foliage provides a distinct structural silhouette compared to broader Alternanthera varieties.
Dense leaf structure gives cover and shelter for dwarf shrimp and timid fish species.
Care & Planting Instructions
Remove lead weight and cotton wrap (or foam) surrounding the base, then strip the lower inch of foliage so bare stems anchor cleanly into soil without rotting.
Use fine-tip pinsettes to push individual stems 1 to 2 inches into soil, spacing them so light reaches lower growth.
Provide medium-to-high lighting. Pressurized CO2 injection is highly recommended to yield maximum ruby-purple coloration and prevent stunted leaf 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 stem tops with straight scissors once they reach the desired height to keep growth compact, and replant the trimmings into the substrate to propagate. 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!
Attribute
Specification
Scientific Name
Alternanthera reineckii ‘Lilacina’
Common Name(s)
Alternanthera Lilacina, Alternanthera Reineckii Lilacina, AR Lilacina
Family
Amaranthaceae
Plant Type / Taxonomy
Stem Plant
Care Difficulty
Easy to Moderate
Light Requirement
Medium to High
CO2 Requirement
Required (Essential for rich purple/red colors)
Placement / Usage
Midground / Background Bushing
Height / Size
4–12”+
Growth Rate
Moderate to Fast
Water Parameters
pH 6.5–7.5
Propagation Method
Cuttings (Cut stem and replant tops)
Origin
Central & South America
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. How do I get my Alternanthera Lilacina to develop deep purple and red leaves?
Achieving the rich, purple-red coloration on Alternanthera Lilacina requires high light intensity, pressurized CO2 injection, and consistent dosing of liquid micro-nutrients and iron. Soil-based substrates also support healthy root uptake for better coloration.
3. How do I transition Alternanthera Lilacina from emersed to submerged growth?
When transitioning from emersed to submerged growth, plant bare stems securely into rich substrate under strong lighting and keep water parameters stable. As new growth adapts, the plant will shed its olive-green emersed foliage and sprout soft, deep magenta-purple underwater leaves. Once new shoots develop, trim away old lower growth to encourage dense branching.
