Common Water Clover

The four-lobed leaves of Marsilea quadrifolia look like a miniature four-leaf clover, which makes it one of the more recognisable foreground plants even to non-aquarists. It is a temperate aquatic fern native to Europe and Asia, where it grows as a marsh plant in nutrient-poor waterbodies. In Germany it is listed as extinct in the wild and strictly protected by law.

Identification in the aquarium trade is unreliable: most water clover sold under this name is actually a different Marsilea species (M. crenata, M. hirsuta, or M. exarata), and the true M. quadrifolia can only be confirmed by examining its sporocarps on emersed growth. The plant spreads by runners and forms low patches over time. It grows both submerged and emersed, and the leaves develop their characteristic clover shape more prominently in the open air.

Flowgrow publishes no cultivation parameters for this species, and its aquarium suitability is listed as unknown. Catalog values here are estimated from general Marsilea care. care. The plant is fully hardy outdoors in Central Europe and suits ponds as well as cool-water aquariums. If kept in a tropical tank, moderate light and stable conditions give the best chance of success.