Scientific Name: Eleocharis montevidensis
Common Name: Giant Hairgrass, Montevideo Hairgrass
Origin: North, Central, and South America
Growth Rate: Moderate to Fast
Difficulty Level: Easy to Moderate
Temperature: 18–30°C
pH: 6.0–7.5
GH: 2–15 dGH
KH: 1–8 dKH
Moderate to high lighting is recommended.
Higher light intensity promotes denser growth and a vibrant green appearance.
Under lower light conditions, leaves may become longer and less compact.
CO₂ supplementation is beneficial but not essential.
Encourages faster growth, increased runner production, and denser stands.
Adapts well to both low-tech and high-tech aquariums.
Primarily a root-feeding plant.
Benefits greatly from nutrient-rich substrates and root tab supplementation.
Requires adequate nitrate, phosphate, potassium, and micronutrients for healthy growth.
Regular fertilization supports lush green foliage and vigorous propagation.
Best suited for the midground to background.
Ideal for creating natural grass-like meadows and flowing background effects.
Can also be used around hardscape features to create a wild, natural appearance.
Propagates through runners.
Daughter plants develop along runners and can be separated and replanted once established.
Spreads steadily under favorable conditions to form dense colonies.
Allow sufficient space for runner expansion.
Periodic trimming helps maintain the desired height and encourages fresh growth.
Plant individual clumps with spacing to achieve a natural meadow effect.
Nutrient-rich substrate significantly improves growth and spreading.
Eleocharis montevidensis is a striking grass-like plant valued for its long, arching leaves and natural meadow appearance. Larger than traditional dwarf hairgrass species, it is ideal for creating dynamic midground and background landscapes that mimic natural wetlands and riverbanks. With balanced fertilization, stable water conditions, and optional CO₂ supplementation, it develops into lush green stands that add movement, depth, and realism to Nature, Dutch, and biotope-style aquariums.
