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Micranthemum sp. "Montecarlo-3"

Micranthemum sp. "Montecarlo-3"

Micranthemum sp. "Montecarlo-3" is a popular aquatic plant, cherished for its compact, carpeting growth habit, making it ideal for the foreground or midground of aquariums. It stands out for its moderate growth rate and its ability to form dense, vibrantly green carpets.

Taxonomy
Class:Liliopsida
Order:Lamiales
Family:Linderniaceae
Genus:Micranthemum
Species:Micranthemum sp. "Montecarlo-3"

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Water Temperature

20 - 28 °C

pH Value

6 - 7.5

Water type

Freshwater

Light

Medium - High

CO2

Medium - High

Expected height

5 cm

Expected width

15 cm

KH

2 - 10 dKH

Species description

Although the "Montecarlo-3" designation likely refers to a cultivar or selected lineage, the genus Micranthemum is native to the Americas, particularly the humid, marshy regions of South America. It naturally thrives along the edges of rivers and ponds, often in submerged or semi-submerged conditions, benefiting from a rich substrate and freshwater. The natural habitat of these plants is characterized by stable temperatures and relatively soft, slightly acidic waters, with abundant filtered light that encourages them to form dense mats. Micranthemum sp. "Montecarlo-3" belongs to the Linderniaceae family, previously classified under Scrophulariaceae.

Care, breeding and tankmates

This plant thrives in stable water conditions, with a temperature range of 20 to 28 °C, which supports its metabolism without stress. It prefers slightly acidic to neutral pH, ideally between 6.0 and 7.5, reflecting the conditions of its natural habitats. Carbonate hardness (KH) should be maintained between 2 and 12 dKH, indicating a preference for soft to medium-hard water. Extreme fluctuations in water parameters can stress the plant, slowing growth and encouraging algae; therefore, regular water changes and constant monitoring are essential. Micranthemum sp.

Geographic Origin and Distribution

This species originates from: South America (likely cultivar).

Origin

Extra-Amazon South AmericaAmazon, Orinoco, and GuianasSelective breeding and cultivars

Plant profile

Placement
Midground

It is primarily used in the foreground to form a thick, lush carpet. It can be planted directly into the substrate in small patches. It also serves beautifully as a cascading plant over hardscape elements.

Botanical form
runner

It exhibits creeping stems densely packed with small, bright green leaves. The mats it forms are compact and uniform in texture. The delicate root system anchors it securely into fine substrates.

Growth
Medium

Its growth rate is typically fast when grown under high-intensity lighting and CO2. Without adequate light, it may struggle to spread and instead grow upwards. Once established, it can cover the substrate remarkably fast.

Substrate
High
Column fertilization
Recommended

It responds very well to regular liquid fertilization dosed directly into the water column. A balanced all-in-one fertilizer will support its rapid growth. Consistent nutrient availability is key to preventing deficiency symptoms.

Root fertilization
Recommended

A fertile substrate such as aquasoil gives this plant a strong head start. It benefits from root tabs inserted beneath the carpet if the soil loses its nutrients over time. Soft, fine-grained soils are optimal for root penetration.

Trimming
Occasional

Frequent pruning is necessary to maintain a healthy carpet and prevent it from uprooting itself. Use sharp curved scissors to trim the top layer evenly. The cut portions can easily be replanted to expand the carpet.

Propagation
Runners

Propagating this plant is as simple as snipping off runners or dividing the carpet. Replant these sections a small distance apart to cover new areas. It will naturally bridge the gaps as it grows outwards.

Sensitivity
Moderate

It is sensitive to poor flow and heavy debris accumulation within its dense mat. Sudden fluctuations in CO2 can lead to melting or stunted growth. It is relatively resilient against minor parameter shifts once fully established.

Layout role
Foreground, Midground

It acts as a brilliant foreground carpet that unifies the aquascape. It helps transition smoothly from the substrate to the midground hardscape. Its lush appearance provides an excellent sense of scale.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Recommendations grouped by close relatives, companion choices, and similar care.

Variants and close relatives

Same atlas type, nearby scientific identity, genus, or family.

Micranthemum micranthemoides

Micranthemum micranthemoides

Micranthemum micranthemoides

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Cuba (HC)

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Monte Carlo

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Micranthemum tweediei 'Monte Carlo'

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Micranthemum tweediei

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Hemianthus glomeratus

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Hemianthus sp. "Amano Pearl Grass"

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Micranthemum umbrosum

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Lindernia anagallis

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Lindernia dubia

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Lindernia grandiflora

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Lindernia sp. 'India'

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Hemianthus micranthemoides

Hemianthus micranthemoides

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Hemianthus sp. "Göttingen"

Hemianthus sp. "Göttingen"

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Hemianthus callitrichoides 'Cuba'

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Lindernia rotundifolia

Lindernia rotundifolia

Lindernia rotundifolia

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Lindernia rotundifolia 'Variegated'

Lindernia rotundifolia 'Variegated'

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Recommended companions

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Commelinaceae sp. "Green"

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Blackline Tetra
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Invertebrate

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Bucephalandra motleyana "Braun-rot" ("Serimbu")

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Bucephalandra motleyana "Kapit"

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Bucephalandra motleyana "Pancuraji"

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Bucephalandra sp. "Bukit Kelam / Sintang"

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Bucephalandra sp. "Melawi"

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Cordyline fruticosa

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Last updated: 06/16/2026
Micranthemum sp. "Montecarlo-3" Care Guide & Tank Setup | Atlarium