Mermaid Weed Proserpinaca palustris

Mermaid Weed (Proserpinaca palustris) is a captivating and highly sought-after stem plant native to the wetlands and marshes of North and Central America, prized in the aquarium hobby for its dramatic leaf transformation. Emersed leaves are serrated and lance-shaped, but once submerged, they morph into deeply pinnate, feathery fronds in warm amber, orange, and red tones — a metamorphosis that makes it one of the most visually striking plants in any high-tech aquascape. Its rich autumnal colouration and delicate texture create a stunning focal point in the midground to background of any planted tank.

Propagation: Take stem cuttings of 5–10cm, remove lower leaves, and replant into the substrate. Regular trimming encourages bushy, dense growth and intensifies leaf colouration.

Care Guide

• Origin: North & Central America
• Light: High
• Water Parameters: pH 5.5–7.0 | Temp 20–28°C | Soft to moderately hard water
• CO2 Required: Yes (essential for best colour and leaf transformation)
• Fertiliser: Regular liquid fertiliser with iron and micronutrients essential
• Placement: Midground to Background
• Skill Level: Intermediate to Advanced
• Max Size: 20–40cm