Vallisneria Gigantea 'Rubra'

Quick facts

Identity

Also known as

Red Jungle Vallisneria; Giant Red Vallisneria; Rubra Giant Red; Red Giant Val

Synonyms

Vallisneria gigantea 'Rubra'; Vallisneria gigantea rubra

Environment

Freshwater

Native to

Australia

Habitat

Rooted in lakes, rivers and slow-moving streams, often in soft acid to hard alkaline water

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Rosette

Max height

12 – 36 in (30 – 91 cm)

Spread

12 in (30 cm)

Growth rate

Fast

Placement

Background

Water

Temperature

64 – 82 °F (18 – 28 °C)

pH

6.5 – 8.0

GH

3 – 20 dGH

Flow

Moderate

Light

Medium

CO₂

Not needed

Planting

Substrate

Nutrient-rich preferred

Feeds from

Roots

Fertilizer needs

Medium

Colors

Green, Red, Brown

Feeding & breeding

Propagation

Runners

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Care guide

Overview

Bronze-red ribbon leaves distinguish this Vallisneria from the plain green form, with coloration intensifying under strong light and fading to green if lighting is weak. A fast-growing background rosette for larger tanks, it roots deeply, sends out runners readily, and needs periodic thinning to keep its spread in check.

Care

Red Jungle Vallisneria is a hardy, undemanding tape grass suited to larger aquariums where its ribbon-like leaves can stretch toward the surface. It tolerates a wide range of water chemistry and does not require CO2 supplementation, though strong lighting is needed to bring out the reddish-bronze leaf tones; under weaker light the plant simply grows green. Once established it sends out runners freely and can colonize a substantial footprint if daughter plants are not thinned periodically.

Planting & trimming

Push the roots into the substrate with the crown left exposed above the surface, since burying the crown invites rot. It anchors deeply and resists being uprooted by digging fish once established. Avoid heavy pruning of mature leaves; instead remove only fully dead leaves at their base.

Fertilizing

As a heavy root feeder, this plant benefits from root tabs pushed into the substrate near the crown, along with iron and a general liquid fertilizer for the water column. Pale or thin new leaves often signal a lack of iron or micronutrients rather than a lighting problem. It grows in plain sand but reaches its full size and coloration much faster in a nutrient-rich substrate.

Propagation

This plant spreads mainly through runners sent out beneath or along the substrate, each producing a daughter plant with its own root system. New plantlets can be left attached to form a dense colony or separated and replanted elsewhere once rooted. Unwanted runners should be pulled early if a spreading carpet effect at the back of the tank is not desired.

Problems

Cut or damaged leaves tend to rot back from the wound rather than heal, so trimming should be limited to removing dead or dying tissue at the base. Sudden shifts in water parameters or transplant stress can trigger melt, where leaves die back before regrowing once the plant resettles. Poor flow around dense leaf clusters can allow detritus and algae to accumulate on the foliage.

Sources

1. Vallisneria Rubra care: light, CO2 and placement · TankBud
2. Red Jungle Vallisneria (Vallisneria gigantea rubra)- Aquatic Arts
3. Vallisneria rubra Care Guide – Growing Rubra Giant Red in Aquariums

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