Propagating Leopard Vallisneria (Vallisneria spiralis 'Leopard')

How to propagate Leopard Vallisneria (Vallisneria spiralis selection): a rosette tape grass that spreads by runners into dense stands. Step-by-step separation, conditions and care.

Overview

Leopard Vallisneria is a selection of Vallisneria spiralis, a tape grass found in tropical and sub-tropical regions worldwide. It grows as a rosette of narrow, linear ribbon-like leaves up to about 1 m long and under 2 cm wide, rising from the base. It is a hardy background plant.

Like all tape grass, it most often propagates by runners, which can lead to dense stands. Daughter plants form along these runners and, once established, turn the back of the tank into a lush grassy jungle.

Propagation Method (Runners)

Propagation is by runners (stolons) only, never by cutting or topping the leaves. The mother rosette sends horizontal runners through the substrate, and a new daughter rosette sprouts at each node.

Step-by-Step

Wait until the mother plant sends runners and the daughter rosettes have grown several leaves and their own roots.
Trace the runner from the mother across the gravel to a rooted daughter rosette.
Pinch the runner between two daughters so each separated plant keeps its own roots.
Pull the daughter out of the gravel and replant it where you want it.
Bury only the roots and keep the crown above the substrate so it does not rot.
Add a root tab or all-in-one fertilizer to feed the new plant.

Conditions for Healthy Growth

Lighting: prefers good light; use a quality planted-aquarium LED.
Substrate: prefers a nutrient-rich substrate.
Nutrients: feed it (e.g. an all-in-one fertilizer); it uptakes a lot of nitrates.
CO2: not required.
Temperature: 18-28 C; pH 6-8; GH 5-16.

Maintenance

Vallisneria will keep spreading through the gravel; if it grows somewhere you do not want it, just pull it out and replant where you want it. Feed regularly and provide light, and it stays low-maintenance for beginners and experienced keepers alike.

Common Challenges

Separating daughters before they have roots, which stalls them.
Burying the crown when replanting, which causes rot; keep the crown above the substrate.
Runaway spreading into other areas; control it by pulling and replanting unwanted runners.