Marsilea crenata – UNS

Origin: Australia
Usage: Foreground, Carpeting, Nano Tanks
CO2: Low
Light: Low – High
Care: Easy
Growth Form: Rhizome, Fern
Growth Rate: Medium
Height:  0.5 – 1.2”
Width: Carpeting
Temp: 64 – 86F

Marsilea crenata, also known as Dwarf Waterclover, is a charming aquatic fern native to tropical Asia and Australia, perfect for creating a lush, low-growing carpet in freshwater aquariums. Often labeled as Marsilea minuta by suppliers such as Tropica, this versatile plant naturally thrives in wetlands like rice paddies, swamps, and floodplains. In its emersed form, it resembles a four-leaf clover, making it an attractive choice for paludariums and wabi-kusa as well. Once submerged in the aquarium, Marsilea crenata transitions to smaller, rounded leaves and begins spreading via creeping rhizomes to form a dense carpet just 1–3 cm tall—ideal for nano tanks and foreground aquascaping.

This hardy carpeting plant requires minimal care and is well-suited for low-tech setups. While it can tolerate low light and does not require CO₂ injection, Marsilea crenata thrives best with moderate lighting, nutrient-rich substrate, and occasional CO₂ supplementation. Planting is simple: remove rockwool or culture medium, divide into small portions, and place evenly in the substrate. Over time, the rhizomes will connect and spread, forming a cohesive green mat. Occasional trimming helps maintain thickness and encourages healthy growth. With its slow to moderate growth rate and small leaf size, Marsilea crenata offers an elegant and manageable alternative to faster-growing carpet plants like Glossostigma elatinoides.