Mermaid Weed - Proserpinaca palustris
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Proserpinaca palustris, also known as Mermaid Weed or Marsh Mermaidweed, is a distinctive stem plant admired for its finely serrated, saw-tooth leaves that develop striking copper, orange, or red tones under strong lighting. Its unique texture makes it a standout accent plant in nature-style and high-tech aquascapes.
Common Name: Mermaid Weed
Scientific Name: Proserpinaca palustris
Family: Haloragaceae
Size: Can grow up to 8–16 inches (20–40 cm)
Difficulty: Moderate
Native Region: North and Central America
Tank Size: Suitable for medium to large aquariums
Temperature: 72–82°F (22–28°C)
pH: 6.0–7.2
Lighting: High
CO₂: Recommended for strong coloration and finely serrated leaf growth
Substrate: Nutrient-rich substrate preferred
• Color Development: High light and CO₂ bring out intense copper and red hues.
• Leaf Form: Under low light, leaves may appear rounder; high light encourages the signature saw-tooth form.
• Trimming: Regular pruning helps maintain bushy growth and prevents leggy stems.
• Aquascape Use: Excellent as a colorful midground or background focal stem.