Marsilea hirsuta

Overview & characteristics

Marsilea hirsuta is a creeping plant used in planted aquariums and aquascapes. In most layouts it is treated as a creeping plant that influences the overall structure of the scape. The overall care level is rated as easy and it is generally considered suitable for aquarium use. The difficulty rating mainly reflects how consistently stable conditions must be maintained, not necessarily extreme technical requirements. Aquarists who enjoy easy plants can compare this species with other entries in the easy section of the AquariumLesson plant library.

For broader context on plant categories and planted tank basics, see our Aquarium Plants lesson.

Habitat & water conditions

Under aquarium conditions this plant is usually kept in a temperature range of from 20 °C. The reported carbonate hardness range is 0–10 °dKH. Compatibility with tap water depends on local water chemistry and long-term stability. Target nutrient ranges in the dataset include nitrate around 10–50 mg/L, phosphate around 0.5–3 mg/L, potassium around 5–50 mg/L, iron around 0.05–0.2 mg/L. Maintaining stable levels is generally considered important in planted aquariums. Overall it is regarded as suitable for long term aquarium use, as long as temperature, pH and nutrient supply remain reasonably stable. For most home aquariums these ranges are well within what can be achieved with regular water changes and careful fertilizing, as documented across many profiles in the AquariumLesson plant library.

Key care ranges at a glance:

• Temperature: from 20 °C
• KH: 0–10 °dKH
• Nutrients: NO₃ 10–50 mg/L, PO₄ 0.5–3 mg/L, K 5–50 mg/L, Fe 0.05–0.2 mg/L

To translate ranges into your actual setup, tools like Aquarium Lighting Calculator · Aquarium Volume Calculator can help.

Growth & morphology

In terms of growth form this plant behaves like a creeping with a slow growth rate in most aquariums. The database indicates that emersed growth is possible. Practical results may vary depending on humidity and cultivation method.

Care requirements

From a care perspective this plant is typically rated as easy, which means it will appeal to aquarists who are comfortable providing stable conditions without necessarily needing extreme parameters. Light requirement in the dataset is listed as medium. Plant appearance can vary depending on light intensity and overall system balance. Consistent macro- and micronutrient dosing, combined with regular water changes, helps to prevent deficiencies and keeps the plant responsive to trimming. Taken together, these requirements make the plant a suitable candidate for long term display in aquariums that offer stable lighting, CO₂ and water quality.

To translate nutrient target ranges into real dosing amounts, the Fertilizer Dosing Calculator can help. To better understand nutrient balance and deficiency patterns, see our lessons on macronutrients and micronutrients.

Placement in aquascapes

Aquascapers usually treat it as a creeping and combine it with foreground and background plants to build a layered composition. It is commonly used to keep layering clean and maintain long-term layout structure with predictable growth. Aquarists looking for more plants with a similar difficulty level can browse additional profiles in the easy category of the AquariumLesson plant library.

More aquascaping and planting guides can be found in our Lessons overview.