Umbrella Hairgrass care guide
Umbrella Hairgrass (Eleocharis vivipara) — medium light, 20-28 °C, pH 6-7.5, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Umbrella Hairgrass (Eleocharis vivipara) is an aquatic plant of the family Cyperaceae, listed in the Aquairi knowledge base as a beginner-level species. It is typically grown under medium light and without obligatory CO2 injection on nutrient-rich aquasoil. Larger Eleocharis with arching stems that produce plantlets at the tips, creating a fountain effect. Good background-to-midground plant in low-tech setups; tolerates medium light.
Taxonomy
- Family: Cyperaceae
- Genus: Eleocharis
- Scientific name: Eleocharis vivipara
Habitat
Eleocharis is a cosmopolitan genus of spikerushes (Cyperaceae) of marshes, pond margins and seasonally flooded ground. Small species form grass-like submersed lawns in aquariums. In the Aquairi knowledge base, populations associated with this form are recorded from North America.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 20-28 °C (68-82 °F)
- pH: 6-7.5
- GH: 3-14 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 30 cm
- Growth rate: medium
- Recommended placement: midground
Placement
A foreground carpet plant planted in small bundles a few centimetres apart; bright light and added CO2 speed the spread of runners into a dense lawn. In the Aquairi knowledge base this form is recommended for the midground under medium light and without obligatory CO2 injection, using nutrient-rich aquasoil.
Propagation
Spreads by runners that throw daughter plants across the substrate, quickly knitting separate plugs into a continuous carpet. Documented propagation techniques for this entry include: adventitious plantlets on flower stalks.
Common issues
Under low light the blades stretch tall and the carpet thins; trapped detritus and surface algae are reduced by good flow and periodic trimming.
Propagating Eleocharis vivipara by Adventitious Plantlets
Overview
Eleocharis vivipara, the umbrella hairgrass, is a grass-like spikerush in the family Cyperaceae. Eleocharis plants are grass-like and grow in aquatic habitats; the larger umbrella hairgrass sends out arching stems that bend over and form young plants at their tips, creating a fountain-like effect. It is an easy, beginner-friendly midground-to-background plant for low-tech tanks under medium light.
Propagation Method (Adventitious Plantlets)
This species reproduces vegetatively: each arching stem produces a plantlet at its tip, which arches down to the substrate and roots where it touches, chaining one new plant to the next. Hairgrass also spreads by horizontal stolons or runners that carry a small plantlet at the end, forming a long chain of connected grass. Propagation is therefore a matter of detaching these rooted tip-plantlets and replanting them where you want new growth.
Step-by-Step
- Allow the arching stems to bend down so the tip-plantlets reach the substrate.
- Let each tip-plantlet anchor and develop its own roots.
- Detach the rooted plantlet from the parent stem with clean scissors.
- Push the roots into the substrate without burying the base of the leaves.
- Space the plantlets apart so each has room to form its own runners.
- Leave undisturbed and let the chain of plantlets spread into a fuller stand.
Conditions for Healthy Growth
Umbrella hairgrass tolerates medium light and a temperature of 20-28 C, with pH 6-7.5 and GH 3-14. A nutrient-rich substrate or root tabs encourage it to send out runners and plantlets more rapidly. CO2 is not required, and the plant can also grow emersed.
- Lighting: medium
- Temperature: 20-28 C
- pH: 6-7.5, GH: 3-14
- Substrate: nutrient-rich (encourages runners)
- CO2: not required
Maintenance
Trim the grass roughly once a month to control height and density and to keep the fountain shape tidy. Thin out crowded clumps by lifting and replanting plantlets elsewhere, and keep root tabs topped up so the stand keeps producing fresh tip-plantlets.
Common Challenges
- Plantlets planted in one dense bunch crowd each other and spread slowly.
- Burying the base of the leaves can cause the crown to rot.
- Poor substrate and low nutrients slow runner and plantlet production.