Propagating Eleocharis vivipara by Adventitious Plantlets

Umbrella hairgrass spreads by plantlets that form at its arching tips and root where they touch down. Learn to detach and replant these tip-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.