Mermaid Weed (Proserpinaca palustris) – Unique Transforming Plant With Serrated, Mermaid-Tail Leaves
Mermaid Weed is an eye-catching and unique aquatic plant known for its dramatic leaf transformation. When grown submerged, it develops beautiful serrated, mermaid-tail-shaped leaves that range from bright green to orange or copper-red depending on light intensity. Emersed growth has simpler, rounded leaves, but once submerged, it converts into its iconic feathery form.
This plant adds an exotic texture to aquascapes and stands out beautifully among stem plants. It thrives in medium to high light, with CO₂ and nutrient-rich water enhancing color and leaf definition. Though moderately demanding, Mermaid Weed rewards good care with stunning coloration and intricate leaf structure.
Moderate
Peaceful (plant)
Up to 10–16 inches tall with trimming
Continuous with proper care
Liquid fertilizers, iron supplements, root tabs (optional), and CO₂ recommended for best growth and color
Minimum 10 gallons
Temperature: 68–80°F
pH: 6.0–7.2
Hardness: Soft to moderately hard
Safe with shrimp, snails, and peaceful fish
Grows slower than most stem plants, making it easy to maintain shape
Provides gentle shelter for fry and shrimp due to fine leaf structure
Best positioned midground or background for visual impact
Requires stable high light to form its signature serrated leaf shape
CO₂ helps achieve the intense orange-red coloration
Trim tops and replant to keep the plant dense and healthy
Avoid large plant-eating fish, as the delicate leaves can be damaged
