Source: Wikimedia Commons
Hairgrass
IntermediateAvenella flexuosa
A foreground plant with thin thread-like leaves spreading like a meadow. Spreads by runners creating natural aquascapes.
About
Eleocharis acicularis — commonly called dwarf hairgrass — is a sedge in the family Cyperaceae, distributed widely across temperate to tropical regions of the Northern Hemisphere. Its needle-fine, upright leaves spread horizontally via runners to form a close-cropped, lawn-like carpet across the foreground substrate. Adequate light is essential: insufficient illumination causes upward elongation rather than dense lateral spreading. CO2 injection dramatically accelerates both horizontal spread and overall vigor. Fine-grained sandy substrates allow runners to penetrate and spread with particular ease. Broad water-parameter tolerance makes it relatively resilient. Regular 'mowing' — trimming the mat to a uniform height — stimulates the production of new lateral growth and increases carpet density over time, ultimately yielding the flawlessly groomed foreground for which it is celebrated.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Northern Hemisphere, temperate to tropical regions (widely distributed)
Lifespan
Perennial
Size
3-15cm
Temperature
15〜28℃
Watering & Fertilizer
Root tabs, CO2
Growing Tips
Growth
CO2添加で成長が大幅に促進
Lighting
明るい照明が必要
Breeding
ランナーで横に広がって増える
Grooming
定期的にトリミングすると密度が上がる
Housing
ソイルでの育成が容易
Hairgrass FAQ
QWhat is the growing difficulty level for Hairgrass?
Intermediate. A variety suitable for intermediate growers. Requires some cultivation experience and knowledge of environment management. Pay careful attention to temperature and humidity control.
QWhat is the ideal temperature for Hairgrass?
The ideal temperature for Hairgrass is 15〜28℃. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Hairgrass?
The average lifespan of Hairgrass is Perennial. With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Hairgrass get?
The mature size of Hairgrass is 3-15cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Hairgrass?
Hairgrass: watering & fertilizer — Root tabs, CO2. Aim for appropriate frequency and amount.
QWhat is the typical price for Hairgrass?
The price of Hairgrass varies significantly by variety, characteristics, size, and lineage. Please check ボタちょく's price guide for the latest market information.
Last updated: June 24, 2026
References & Sources
Taxonomy & Authority
Related Species
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