Marsilea crenata

Description

Marsilea crenata, commonly known as the dwarf water clover or water clover, is an appealing aquatic fern gaining popularity in the aquarium hobby for its resemblance to a four-leaf clover and its ability to form a lush green carpet. This versatile plant is native to Southeast Asia and Australia, thriving in shallow, low-flowing freshwater environments such as ponds, lakes, slow-moving streams, ditches, and rice paddies. It can be found rooted in sandy or muddy substrates and is capable of growing both fully submerged and partially emerged. It is a low-maintenance plant often used for foreground carpeting.

Care

Care is generally easy to moderate, making it suitable for many hobbyists. Provide moderate to high lighting for dense carpet growth, although it can tolerate lower light. Aim for 8-10 hours of light per day. Maintain a temperature range of 20-28°C (optimal 22-28°C), pH of 6.5-7.5, and moderate water hardness (3-15 dGH). A nutrient-rich fine gravel or sand substrate of at least 5-7.5 cm depth is preferred. Fertilization via root tabs or liquid fertilizers is beneficial. While not strictly required, CO2 supplementation greatly enhances growth.

Propagation

This plant primarily propagates through runners (rhizomes) that spread horizontally across the substrate. You can easily propagate it by simply dividing the rhizomes or cutting sections of the runners and replanting them in the desired location.

Trimming

Regular trimming is essential to maintain the desired carpet shape and prevent the plant from becoming too thick, which can shade out lower layers or other foreground plants. Simply use sharp aquascaping scissors to trim away excess runners or fronds. Trimmed pieces can often be replanted.

Notes, Tips, and Considerations

• Marsilea crenata can be quite aggressive in ideal conditions and may outcompete other plants if not regularly trimmed to maintain density and prevent it from becoming too thick.
• Young leaves may have a brownish color due to carotenoids before turning green.
• It is also known to be edible in some regions and can be found in rice paddies.
• It is an emergent aquatic plant suitable for paludariums and vivariums, where it will display its four-leaf clover appearance more prominently when grown emersed.

Naturally Found

• Regions
  • Asia
    • Directions: East, South
  • Australia
• Environment
  • Habitat: pond, lake, river, marsh, wetland
  • Water Type: freshwater
  • Water Depth: 0 – 0.5 m
  • Water Flow: slow
  • Light: medium, high
  • Temperature: 18 – 30 °C
  • Humidity: high
  • Substrate: gravel, sand, mud