Dwarf Hairgrass – Eleocharis parvula / Eleocharis acicularis
Dwarf Hairgrass (Eleocharis parvula or Eleocharis acicularis, depending on supplier) is one of the most popular carpeting plants in the freshwater aquarium hobby. Its fine, grass-like blades create a lush, natural green carpet across the foreground of aquascapes.
Sold as a clump, Dwarf Hairgrass can be divided into smaller portions and planted across the substrate to encourage spreading. With proper lighting, nutrients, and optional CO2, it can form a dense carpet that works beautifully in nano tanks, planted aquariums, and Iwagumi-style layouts.
Key Features
- Popular foreground carpeting plant
- Fine, grass-like green blades
- Creates a natural lawn effect in aquariums
- Great for aquascaping, nano tanks, and Iwagumi layouts
- Provides cover and grazing areas for shrimp and fry
Plant Care Information
- Scientific Name: Eleocharis parvula or Eleocharis acicularis
- Common Name: Dwarf Hairgrass
- Placement: Foreground carpeting plant
- Lighting: Medium to high
- CO2: Recommended for dense, fast carpet growth
- Growth Rate: Moderate to fast under ideal conditions
- Height: Approximately 2–6 inches
- Care Level: Easy to Moderate
Why Choose Dwarf Hairgrass?
- Creates a lush carpet effect in planted aquariums
- Can be trimmed to maintain a short, lawn-like appearance
- Spreads by runners when conditions are stable
- Works well in high-tech planted tanks and aquascapes
- Helps create a natural look for shrimp tanks and small fish setups
Planting Tips
For best results, divide the clump into small portions and plant them a few centimeters apart across the foreground. Smaller sections encourage better spreading and help the plant fill in more evenly over time.
Use nutrient-rich substrate or root tabs to support healthy root growth. Dwarf Hairgrass can grow in low-tech aquariums, but growth will usually be slower and less dense without strong lighting and CO2.
Lighting, CO2 & Nutrients
Dwarf Hairgrass grows best with medium to high lighting, consistent nutrients, and stable CO2 injection. While CO2 is not absolutely required, it is highly recommended if you want a thick, low-growing carpet.
Without CO2, Dwarf Hairgrass may grow slower, taller, or spread less aggressively. Regular trimming helps encourage new runner growth and keeps the carpet dense.
Trimming & Maintenance
Trim Dwarf Hairgrass regularly to maintain a short, compact carpet. Trimming helps prevent the upper growth from shading lower leaves and encourages the plant to send out new runners.
Remove any loose or melting plant material during maintenance to keep the aquarium clean and help new growth establish.
Frequently Asked Questions
How do you plant Dwarf Hairgrass clumps?
Break the clump into small sections and plant them a few centimeters apart in the substrate. Over time, runners will spread and help form a carpet.
Does Dwarf Hairgrass need CO2?
Dwarf Hairgrass can grow without CO2, but supplemental CO2 is highly recommended for a lush, dense, fast-spreading carpet.
How tall does Dwarf Hairgrass grow?
Dwarf Hairgrass typically grows 2–6 inches tall depending on lighting, nutrients, CO2, and trimming.
Where should I place Dwarf Hairgrass in the aquarium?
Dwarf Hairgrass is best used as a foreground plant. It is ideal for carpeting nano tanks, planted aquariums, and Iwagumi-style aquascapes.
Is Dwarf Hairgrass good for shrimp tanks?
Yes. Dwarf Hairgrass provides cover, grazing surfaces, and natural shelter for shrimp and fry.
How fast does Dwarf Hairgrass spread?
With high light, good nutrients, and CO2, Dwarf Hairgrass can spread quickly through runners. In low-tech setups, growth is slower and may require more patience.
Does Dwarf Hairgrass need trimming?
Yes. Regular trimming helps keep the carpet dense, prevents excessive height, and encourages new runner growth.
Available at Tropical Treasures Wyo
Dwarf Hairgrass is a beautiful choice for aquarists looking to create a natural carpet effect in freshwater planted aquariums. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, or shop online for live aquarium plants, freshwater fish, shrimp, and aquarium supplies.
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