Propagating Twisted Vallisneria (Vallisneria asiatica 'Torta')

How to propagate Twisted (corkscrew) Vallisneria, a V. asiatica selection: a rosette tape grass that spreads by runners. Step-by-step separation, conditions and care.

Overview

Twisted Vallisneria (Vallisneria asiatica 'Torta') is a tape grass from the genus Vallisneria, a freshwater plant widely distributed across tropical and subtropical Asia and beyond. Its corkscrew leaves arise in clusters from the roots at the base, forming a submerged rosette.

It multiplies readily through runner production in established tanks, spreading by runners that produce daughter plants at their nodes. Once daughter plants establish roots, they can be separated and transplanted.

Propagation Method (Runners)

Propagation is by runners (stolons), not by cutting leaves. Horizontal runners arch over the substrate and develop plantlets at their nodes, each becoming a new twisted rosette.

Step-by-Step

Let the mother plant produce runners and wait until the daughter plantlets at the nodes have established their own roots.
Follow a runner across the substrate to a rooted daughter plant.
Once the daughter has roots, separate it from the runner.
Lift it from the gravel, keeping the fibrous roots intact.
Transplant the daughter where you want it, burying only the roots and keeping the crown above the substrate.
Add iron-rich fertilizer or a root tab to the gravel to support it.

Conditions for Healthy Growth

Lighting: provide good light with a quality planted-aquarium LED.
Substrate: accepts plain gravel with iron-rich fertilizer supplementation.
Water: tolerates neutral to alkaline water and dislikes acidic conditions.
CO2: does not require carbon dioxide fertilization.
Temperature: 18-28 C; pH 6-8; GH 5-16.

Maintenance

In an established tank it multiplies readily, so thin runners that wander out of place by pulling daughter plants and replanting them. Keep the gravel supplemented with iron-rich fertilizer and provide light to keep the twisted leaves dense and healthy.

Common Challenges

Separating daughters before they root, which stalls or kills them.
Acidic water, which this plant dislikes; keep conditions neutral to alkaline.
Burying the crown when transplanting, which causes rot; keep the crown above the substrate.