Marsilea Crenata
Marsilea crenata
An easy carpeting fern with small clover-like leaves for the front.
| Care Difficulty | Beginner |
| Lighting | Medium |
| CO2 Requirement | Optional |
| Growth Rate | Slow |
| Placement | Foreground (carpet) |
Overview
Marsilea Crenata (Marsilea crenata) is an easy carpeting fern with small clover-like leaves for the front. It is a beginner plant to grow, which makes it a great pick for beginners and low-tech tanks.
This guide explains, in plain language, how to grow Marsilea Crenata well: what it looks like, how much light it wants, whether it needs CO2, how to plant and place it, how to make more of it for free, and the simple mistakes to avoid.
Appearance & Growth
An easy carpeting fern with small clover-like leaves for the front.
It is a slow grower and is normally used in the foreground (carpet) of the aquarium. Because it grows slowly, it stays tidy and needs little trimming, though slow leaves can gather algae if the light is very strong.
Lighting
Marsilea Crenata does best under medium light. It wants bright, even light reaching its leaves, so use a good planted-tank LED.
Keep the lights on a timer for about 6 to 8 hours a day. Leaving lights on longer usually grows more algae, not more plant, so add light time slowly and watch for any green film.
CO2 & Fertilising
CO2: Optional. CO2 is optional - it speeds things up but is not essential.
Feed it with an all-in-one liquid fertiliser (such as API Leaf Zone) each week. If leaves turn yellow, get holes, or stop growing, that is almost always a lack of nutrients, not a disease.
Planting & Placement
Plant Marsilea Crenata in small portions spaced a few centimetres apart so they grow together into a carpet. Push the roots gently into the substrate and keep them from floating free until rooted.
How to Propagate (Make More)
Split it into small clumps and plant them in a grid across the front of the tank. They spread by runners and join into a carpet - trimming the tops makes them spread sideways faster.
Swapping cuttings is one of the best parts of the hobby - over time a single healthy plant can fill your tank and stock a few more.
Common Problems & How to Fix Them
The most common problem is algae growing on the leaves. This usually means too much light, not enough nutrients, or weak water flow - not a problem with the plant. Lower the light a little, add fertiliser, and improve flow.
Some leaf loss right after planting is normal while the plant gets used to living underwater - keep your light, CO2 and fertiliser steady and new growth will follow. Always remove dead or rotting leaves quickly to keep the plant and water healthy.
Is Marsilea Crenata Right for Your Tank?
Marsilea Crenata is an easy, rewarding plant that fits almost any freshwater aquarium, including first tanks and low-tech setups. Pair it with our other plant and aquascaping guides to build a lush, healthy planted tank.