Myriophyllum mattogrossense (Matto Grosso Water Milfoil)

25 October 2026

Myriophyllum mattogrossense is a fast-growing South American stem plant with finely divided, feathery leaves arranged around upright shoots. It is commonly used to create dense background growth and provides cover for small aquarium inhabitants. The supplied product label identifies this plant as M. mattogrossense; cultivated specimens can vary in leaf density and color, so visual identification alone should be treated cautiously.

Myriophyllum mattogrossense (Matto Grosso Water Milfoil)

Identification

This species forms upright stems with soft, finely pinnate leaves that give the shoots a bottle-brush appearance. New growth is often lighter green, while older or shaded foliage may appear darker. The supplied label supports identification as Myriophyllum mattogrossense, although a photograph cannot confirm all diagnostic features.

Placement and planting

Use it primarily in the background, where its height and rapid growth can form a dense stand. Separate individual stems and plant them into the substrate with space between them for circulation and light. Do not bury excessive stem length, and remove damaged or melting leaves during establishment.

Light and carbon

Moderate lighting is generally suitable, while stronger light promotes denser, more compact growth. Reliable carbon availability, whether from aquarium carbon dioxide supplementation or stable natural levels, improves growth and leaf quality. Maintain consistent fertilization, especially of nitrogen, potassium and trace nutrients, without allowing nutrients to become unbalanced.

Pruning and propagation

Trim the tops when the stems approach the surface or begin shading neighboring plants. Replant healthy cuttings in the substrate to propagate the plant; rooted lower portions can also produce new side shoots. Regular trimming helps maintain a bushier group and prevents the lower stems from becoming excessively bare.

Routine care

Provide a clean, stable aquarium with good water movement and avoid abrupt changes in lighting or water chemistry. Fast growth can make this plant useful for nutrient uptake, but frequent pruning may be needed. If lower foliage sheds, check for insufficient light, poor circulation, carbon limitation or nutrient deficiencies before discarding the plant.

Plant info

Colors: Green, Light green
Difficulty: Medium
Origin: South America
Usage: Background
Type: Rooted stem plant
Growth rate: Fast
Height: 30-60 cm
Light demand: Medium
CO2: Medium

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Myriophyllum mattogrossense

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