Proserpinaca palustris, also known as mermaid weed, can be found growing throughout the southeastern United States and Latin America in humid soils, ditches, ponds, streams, and marshes. Due to its wide range, this species also exhibits considerable geographic variation; the form with a wider central portion of the leaf sold by Danish plant nursery Tropica is from Cuba. P. palustris has only recently begun to receive international recognition as a desirable aquarium plant, although it has been cultivated in U.S. hobbyist tanks for over a decade. Although it is by no means common in the U.S. trade, P. palustris can be obtained through trading with the many hobbyists who grow it.

This herbaceous plant isn’t too difficult to grow, although it does require a lengthy period to transition from the saw-toothed, green emersed form to the finely-toothed, orange-red submersed form. Moderate to intense lighting (2wpg or more) is necessary for the health and coloration of this species; CO2 injection is highly recommended to achieve the full potential of this plant. Low NO3 (5-10ppm) and high PO4 (1.5-2ppm) values encourage large, compact, deep orange-red growth. If nitrates are kept higher, the plant will exhibit lighter orange to green coloration. Iron fertilization is also critical since a deficiency causes coloration to become washed out and dull.