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Scientific Name: Limnophila aromatica
Common Name: Aromatic Limnophila / Rice Paddy Herb
Origin: Southeast Asia
Family: Plantaginaceae
Height: 20–50 cm
Growth Rate: Moderate
Placement in Tank: Midground, Background
Light Requirement: Medium to High
CO₂ Requirement: Recommended for optimal growth and colouration
Temperature: 22–28°C
pH: 5.5–7.5
Propagation: Stem cuttings
Limnophila aromatica is a striking stem plant from Southeast Asia, valued by aquascapers for its beautiful colouration, elegant leaf structure and ability to create a dramatic focal point in planted aquariums. Depending on growing conditions, its foliage can range from fresh green and bronze to rich reddish-purple and deep purple tones.
Under strong lighting, consistent CO₂ and good nutrition, Limnophila aromatica develops its most intense colours and compact growth. Its upright stems and narrow, textured leaves make it an excellent contrast plant alongside fine-leaved greens, carpeting plants and darker hardscape.
An interesting characteristic of this species is its distinctive aromatic scent when the leaves or stems are crushed – a trait reflected in the name aromatica.
Key Features:
Beautiful Colour Potential: Depending on lighting and growing conditions, the foliage can develop shades of green, bronze, red and purple, making it an excellent colour accent in an aquascape.
Distinctive Leaf Structure: The narrow leaves form attractive whorls around the upright stems, creating both texture and vertical interest.
Excellent Feature Plant: A carefully positioned group can become a striking focal point, particularly when contrasted against bright green plants.
Responds Well to High-Tech Conditions: Strong lighting, stable CO₂ and balanced fertilisation encourage denser growth and significantly stronger colouration.
Aromatic Foliage: When handled or crushed, the leaves release a distinctive fragrance – an unusual characteristic among commonly kept aquarium plants.
Care Requirements:
Lighting: Medium to high lighting is recommended. Stronger light encourages more compact growth and enhances the plant's red and purple colouration.
CO₂: CO₂ supplementation is strongly recommended for the best results. Stable CO₂ encourages healthier, denser stems and improved colour development.
Water Parameters: Limnophila aromatica performs well at temperatures of approximately 22–28°C and in slightly acidic to neutral water, although it can adapt to a broader range of conditions.
Nutrition: Consistent macro- and micronutrient availability is important. Adequate iron and trace elements, together with sufficient nitrogen and other macronutrients, support healthy growth and strong colouration.
Trimming: Regular trimming encourages branching and creates a fuller, bushier group. Once the stems become too tall, the healthy tops can be cut and replanted.
Planting Tips:
Plant individual stems into the substrate with a small amount of space between them to allow light and water circulation around the lower leaves.
For maximum visual impact, plant several stems together to create a dense group rather than using isolated individual stems.
Position Limnophila aromatica in the midground or background, depending on the aquarium size and desired layout.
Regularly trim the growing tips to encourage side shoots and create a compact, bushy appearance.
Replant healthy trimmed tops when necessary to rejuvenate older groups and maintain their best appearance.
For stronger red and purple tones, provide good-quality lighting, stable CO₂ and balanced fertilisation rather than relying on excessive iron supplementation alone.
With its combination of colour, texture and elegant upright growth, Limnophila aromatica is an excellent choice for aquascapers wanting a distinctive stem plant that becomes increasingly impressive under high-quality growing conditions.
