Cardinal Plant – Lobelia cardinalis

The Cardinal Plant (Lobelia cardinalis) is a beautiful and versatile freshwater aquarium plant known for its bright green to reddish leaves and compact growth pattern. Often used as a midground or foreground plant, it adds a natural pop of color and texture to any aquascape. Under strong lighting and nutrient-rich conditions, the undersides of its leaves can develop striking reddish hues.

• Bright green foliage with reddish tones under high light
• Great midground or accent plant for aquascapes
• Can be grown submerged or emersed (above or below water)
• Easy to trim and shape for dense planting layouts
• Perfect for shrimp and community tanks

Care Guide:

• Lighting: Medium to high
• Temperature: 72–82°F
• pH: 6.0–7.5
• Growth Rate: Moderate
• CO₂: Optional but enhances color and growth  ** May not stay purple without CO2
• Placement: Foreground to midground

FAQs:
Q: Can Cardinal Plant grow out of water?
A: Yes, it can be grown emersed—often showing deeper red coloration.

Q: Is it safe for shrimp and snails?
A: Absolutely—it’s 100% safe for invertebrates.

Q: Does it need CO₂ injection?
A: No, but CO₂ will improve coloration and density in aquascaped tanks.