✦ DIFFICULTY Easy

A forgiving choice for newer planted tanks.

☀ LIGHT Low

Around 10 hours is a useful starting point.

≈ CO₂ Optional

Injection is not normally necessary.

↗ GROWTH Slow

Low trimming needs.

PLANT OVERVIEW

About Marsilea Hirsuta

A hardy, clover-like fern that makes a great low-tech carpet.

If you've ever wanted a true aquarium carpet plant that doesn't throw a tantrum over your CO2 setup, Marsilea Hirsuta is the low-maintenance workhorse you've been sleeping on. Native to Australia, this four-leaf clover lookalike spreads through a dense rhizome network that hugs the substrate and creeps outward in every direction, filling gaps other carpeting plants leave behind. Unlike dwarf hairgrass or Monte Carlo, Hirsuta tolerates a wider swing in lighting and CO2 without melting into a brown mush the second conditions aren't perfect.

Under moderate to high light with a nutrient-rich substrate, expect a lush, low-growing clover mat that stays under two inches, perfect for nano tanks, aquascapes, and foreground planting where you want texture without height. In lower light it grows slower and taller, sometimes stretching toward the surface, so trimming keeps that signature carpet look tight.

Shrimp and betta keepers love it because the dense leaf coverage gives baby shrimp and fry somewhere to hide from hungry tankmates, while the root mat helps stabilize substrate and soak up excess nutrients that would otherwise feed algae blooms.
Shrimp friendly Nano suitable Low-tech suitable High-tech suitable
CARE PROFILE

What this plant needs.

The useful numbers and practical notes, grouped around how you actually keep the plant.

□
TANK FIT

Placement + size

Primary placementForeground
Typical height1–3 in
Typical width2 in
Suggested minimum tank5 gal
Suggested tank height5 in+
☀
LIGHT + CO₂

Energy demand

Ideal lightLow
Photoperiod range8–12 hr
Approx. PAR15–60
Injected CO₂Optional
CO₂ benefitLow
●
NUTRITION

Where it feeds

Root feedingModerate
Water-column feedingLow
Overall fertilizer demandModerate
Iron demandLow
MicronutrientsLow
≈
WATER

Useful parameter range

Temperature68–82°F
pH6–7.5
GH2–15 dGH
KH2–12 dKH
PLANTING

How to plant it.

Substrate: Fine substrate

Bury runners slightly.

GROWTH + PROPAGATION

What to expect after planting.

Propagation

Runners

Acclimation

May melt emersed leaves.

COMMON PROBLEMS

What usually goes wrong.

Very slow to spread.