Dwarf Cardinal Lobelia Cardinalis

Dwarf Cardinal Plant (Lobelia cardinalis) - Live Freshwater Aquarium Plant

The Dwarf Cardinal Plant (Lobelia cardinalis) is a versatile and visually striking freshwater aquarium plant native to North America. Known for its compact growth and contrasting leaf coloration, this plant features bright green upper leaf surfaces with reddish to purplish tones on the undersides when grown under stronger lighting.

Unlike many fast-growing stem plants, Lobelia cardinalis grows at a slower, more controlled pace, making it easy to shape and maintain. Its ability to form neat, dense bushes makes it an excellent choice for aquascapers who want color, structure, and balance without aggressive spreading.

Key Features

Compact Stem Growth:
A slow-growing stem plant that forms tidy, bush-like clusters when trimmed regularly.

Color Contrast:
Green leaf tops with red or purple undersides under moderate to high lighting.

Controlled Growth Rate:
Slower growth than most stem plants, making it easier to maintain and shape.

Flexible Placement:
Suitable for foreground or midground placement with trimming; works as a background plant in larger aquariums.

Benefits

Lobelia cardinalis adds natural contrast and visual depth to planted aquariums while remaining manageable in size. Its dense growth provides shelter for fry and small fish, and its slower pace reduces maintenance demands. The plant responds well to pruning, allowing aquarists to shape it into clean, structured bushes for a polished aquascape.

Care Instructions

Lighting:
Moderate to high lighting is recommended to maintain compact growth and enhance underside coloration.

Water Conditions:
Temperature: 68-82°F
pH: 6.0-7.5
Hardness: Soft to moderately hard

Substrate & Planting:
Plant stems directly into nutrient-rich aquarium substrate. Trim tops as needed and replant cuttings to increase density.

CO₂ & Fertilization:
CO₂ supplementation is optional but can significantly improve growth form and color intensity. Regular fertilization supports healthy, vibrant foliage.

Maintenance:
Trim periodically to control height and encourage side shoots. Grows slower than most stem plants, reducing trimming frequency.

Perfect For

• Aquarists who want a structured, bushy plant with controlled growth
• Foreground or midground placement in planted aquariums
• Low-tech to high-tech aquarium setups
• Community tanks with fish, shrimp, and snails
• Aquascapers seeking color contrast without fast-spreading plants

Emersed Growth & Flowering Note

Bright red flowers appear only when grown emersed (above water). Submerged aquarium growth does not produce flowers.

Compatibility

Safe for community aquariums with peaceful fish and invertebrates. Pairs well with Anubias, Cryptocoryne, Java Fern, and other structured aquascaping plants.

Important Notes

Live aquarium plants naturally vary in size, coloration, and growth rate depending on lighting, nutrients, and tank conditions. Images are for reference only and may not represent the exact plant received.