Micranthemum tweediei 'Monte Carlo' is one of the most popular carpet plants in the hobby — bright green, rounded leaves that spread into a dense lawn across the substrate, with a much more forgiving care profile than its finer-leaved cousin, Dwarf Baby Tears.
Why Aquascapers Choose Monte Carlo
Monte Carlo forms a natural-looking carpet that improves water quality by taking up excess nutrients, while giving fish and shrimp a soft surface to graze and hide in. Unlike many carpet plants, it will still carpet under moderate light without CO2, just more slowly — which makes it a realistic choice for low-tech tanks.
Growing Conditions
Monte Carlo grows in a range of lighting but thrives fastest under medium to high light. It prefers a neutral pH and a temperature range of 68–82°F. It can be propagated simply by trimming and replanting the runners it naturally produces.
How to Grow It
Substrate: A nutrient-rich substrate, such as aquasoil, gives the roots something to actually feed from.
Lighting: Aim for 8–10 hours a day of bright light for the fastest, densest carpet.
Water conditions: Neutral to slightly acidic water, 68–82°F (20–28°C), pH 6.0–7.5.
Fertilization: Dose a balanced liquid fertilizer or use root tabs regularly — a carpet plant covering a lot of substrate area needs consistent nutrients to keep filling in.
Pruning: Trim every one to two weeks once it reaches the height you want, which pushes it to spread outward rather than climb over itself.
CO2: Not required, but it noticeably speeds up carpeting and makes the plant more tolerant of higher light.
A Good Starting Point
Our Micranthemum Monte Carlo Vitro Culture is grown pest- and algae-free and gives you enough material to start a solid patch and let it spread from there.
Common Issues and Fixes
Melting shortly after planting is a normal adjustment from emersed to submerged growth — give it two to three weeks before assuming it's failing. Slow or patchy carpeting usually comes down to inconsistent light or nutrients across the substrate rather than the plant itself.
1 Comment
I have a 20g set up, how many groups of Monte Carlo should I start with to get the full coverage I’m wanting?