Monte Carlo (Micranthemum) care guide
Micranthemum tweediei 'Monte Carlo' (WCVP: syn. of M. umbrosum) · Linderniaceae
Monte Carlo (Micranthemum) (Micranthemum tweediei 'Monte Carlo' (WCVP: syn. of M. umbrosum)) is an aquatic plant. It belongs to the Linderniaceae family. It is native to North-eastern Argentina, southern Brazil & Uruguay; the trade stock was collected at Monte Carlo, Misiones (Argentina), hence the name. It needs medium to high light. Water temperature: 20°C – 26°C. pH: 5.0 – 7.5. Care difficulty: Easy (sources range from easy to medium; easier than HC Cuba). Growth rate: moderate.
How do you care for Monte Carlo (Micranthemum)?
| Light | Medium to High (stronger light gives the tightest, flattest carpet; survives lower light but grows looser) |
|---|---|
| CO₂ | Recommended (grows without, but carpets slowly) |
| Temperature | 20°C – 26°C |
| pH | 5.0 – 7.5 |
| Placement | Foreground carpet – plant small portions into fine aquasoil; can also be wedged into hardscape gaps |
| Growth | Moderate |
| Difficulty | Easy (sources range from easy to medium; easier than HC Cuba) |
| Family | Linderniaceae |
How do you trim and propagate Monte Carlo (Micranthemum)?
Once established, trim hard and often with curved scissors; left too thick, the lower layer dies from lack of light and oxygen and whole mats lift and float. Net out floating clippings. Propagate by cuttings, or split clumps and runners into gaps.
What problems affect Monte Carlo (Micranthemum)?
The carpet lifts and floats in mats when grown too thick; loose, straggly growth in low light or without CO₂; portions float up after planting because delicate tissue-culture roots have not anchored yet.
How do you fix Monte Carlo (Micranthemum) problems?
Trim regularly to keep the mat thin; raise light and add CO₂ for a compact carpet; plant deeper or use a dry start before flooding.
Where does Monte Carlo (Micranthemum) come from?
North-eastern Argentina, southern Brazil & Uruguay; the trade stock was collected at Monte Carlo, Misiones (Argentina), hence the name · Biotope regions: South America.
Sources
- Micranthemum 'Monte Carlo' — Tropica
- Micranthemum tweediei 'Monte Carlo' (plant details) — Tropica
- Micranthemum tweediei — Flowgrow Aquatic Plant Database
- Micranthemum tweediei 'Montecarlo' — Dennerle Plants
- Micranthemum 'Monte Carlo' — Buce Plant
- World Checklist of Vascular Plants: Micranthemum tweediei / M. umbrosum — Royal Botanic Gardens, Kew / GBIF
Care details checked against these sources on 2026-09-23.
Which aquascapes and tanks use Monte Carlo (Micranthemum)?
- Balancing light, CO₂ and fertiliser in a planted tank
- Iwagumi aquascape: stones, plants and setup
- Nature Aquarium style: layout rules and setup
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