How to Propagate Marsilea hirsuta

Marsilea hirsuta spreads by creeping runners that build a low clover-like carpet. Learn to divide the mat, replant portions, and keep it healthy.

Overview

Marsilea hirsuta is a fern-ally and one of the easiest carpeting plants to grow. Native to Australia, it forms runners and spreads rapidly across the aquarium floor, colonizing open substrate over time. Its leaf shape is highly variable: depending on light and conditions it may grow a very low form with single leaves resembling a large Glossostigma, or develop two-, three-, and four-lobed clover-like leaves of varying height.

Propagation Method (Runners / Division)

This plant grows from a horizontal creeping rhizome that pushes out runners. New leaves emerge along these runners, gradually knitting into a dense carpet. To propagate, you simply lift and divide a section of the mature mat into smaller portions and replant them, each carrying a piece of rhizome with roots and leaves.

Step-by-Step

Wait until the original planting has filled in and formed a connected mat held together by runners and rhizome.
Gently lift a portion of the carpet, freeing the roots from the substrate without tearing the rhizome.
Separate the mat into smaller plugs, each with several leaves and a section of rhizome with roots.
Replant each plug into nutrient-rich substrate, pressing the rhizome lightly so roots anchor while the crown stays exposed.
Space the plugs a few centimetres apart so their runners can grow and merge into a continuous lawn.

Conditions for Healthy Growth

Marsilea hirsuta has low light and low CO2 demands, thriving even without injected CO2 in moderate lighting. As a root feeder it benefits from a nutrient-rich substrate. Growth is slow to medium, so patience is required while runners knit the carpet together.

Maintenance

Once established, trim back leaves that grow too tall to keep the carpet flat and dense, roughly every three weeks. Thin out crowded patches by dividing and replanting elsewhere, which also encourages fresh runner growth.

Common Challenges

Slow spread: runners take time to colonize, so give the plant weeks to months to fill in.
Leaves growing too tall: increase light and trim to keep the low single-leaf form.
Patchy carpet: replant divided plugs into bare spots and ensure roots are anchored.