Echinodorus 'Rubin Narrow' Care Guide
Echinodorus 'Rubin Narrow' is a narrow-leaved sword hybrid with ruby-red young foliage, a hardy heavy root feeder for the background of low-tech tanks.
Compiled by Aquairi from published sources · Published · Updated
Overview
Echinodorus 'Rubin Narrow' is a cultivated sword plant in the family Alismataceae, a narrower-leaved variant of the 'Rubin' hybrid (also listed as E. 'Rubin' var. lancifolius). Its young submerged leaves emerge an intense ruby red and translucent with light veins, maturing toward brown-olive tones. The leaves are elongated-lanceolate and curved, roughly 2-2.5 cm wide.
Taxonomy
- Family: Alismataceae
- Genus: Echinodorus
- Scientific name: Echinodorus 'Rubin Narrow'
- Origin: cultivated hybrid (does not occur in the wild)
Habitat
As a horticultural hybrid the plant has no natural range; the parent genus Echinodorus is native to the Americas. It is grown purely as an aquarium plant, valued for its red foliage and resilience.
Growth requirements
- Water type: freshwater
- Temperature: 22-28 °C (72-82 °F); tolerates 15-30 °C
- pH: 6.0-7.5 (grows in soft to hard water, pH 6-9)
- GH: 3-14 °dGH (tolerates 0-30)
- Lighting: medium; brightest colour in an unshaded position
- CO2: not required but favourable for growth
The plant is a heavy root feeder and performs best with a nutrient-rich substrate. Growth rate is medium and it develops its strongest colour under bright light.
Placement
The rosette reaches roughly 20-35 cm high and 25-40 cm wide, suiting the midground to background. The KB record lists a maximum height around 50 cm.
Propagation
It is propagated through adventitious plantlets that form on proliferating inflorescences (flower stalks), and by rhizome division. The young plantlets can be detached once rooted and replanted.
Echinodorus 'Rubin Narrow' Propagation: Plantlets and Crown Division
Overview
Echinodorus 'Rubin Narrow' is a narrow-leaved hybrid sword in the family Alismataceae, prized for its deep ruby-red young foliage. Like all Echinodorus, it is a rosette plant: every leaf emerges from a central crown, and it grows as a hardy background plant. Echinodorus are by nature marsh and bog plants that can grow submersed, so this sword adapts readily to the aquarium even without CO2.
It is a heavy root feeder and an undemanding choice for low-tech tanks, provided the substrate carries the nutrients it craves. Good light deepens the red coloration of the new leaves.
Propagation Method
Echinodorus propagation is by division or by adventitious new plants developing on submerged flowering stems. When the plant pushes up a flower stalk underwater, plantlets form along it instead of flowers; once a plantlet grows its own roots and leaves it can be separated and planted as a new sword. A mature crown can also be divided.
In favourable conditions the mother plant produces side shoots and inflorescences. Aquarists let the plantlets develop roots on the stalk, then cut them free — the most reliable way to multiply a 'Rubin Narrow'.
Step-by-Step
- Grow the mother plant strongly until it sends up a flower stalk (inflorescence).
- Leave the stalk in place; adventitious plantlets will form along its nodes.
- Let each plantlet grow several leaves and a small root bundle before separating.
- Cut the plantlet from the stalk with clean scissors.
- Plant it in nutrient-rich substrate, burying the roots but NOT the crown.
- To divide instead, lift the mother plant and split the crown so each section keeps roots and leaves.
Conditions for Healthy Growth
Provide a deep, nutrient-rich substrate — swords are heavy root feeders that prefer to absorb nutrients through their roots rather than the water column. Add root tabs if the substrate is inert or depleted. Keep freshwater warm (about 22-28 C) with a pH around 6-7.5 and medium lighting; additional CO2 helps strong growth but is not required.
- Lighting: medium; brighter light intensifies the ruby-red young leaves.
- Substrate: deep and nutrient-rich, supplemented with root tabs.
- Feeding: heavy root feeder — feed the roots, not the water column.
- CO2: optional; helps but not mandatory.
Maintenance
Once established this sword is low-maintenance. Replenish root tabs periodically because it is a hungry feeder. Trim away old or melted outer leaves at the base, and never bury the crown when planting or replanting — covering the crown causes rot. Remove flower stalks once you have harvested the plantlets if you want the plant to channel energy back into foliage.
Common Challenges
- Burying the crown, which leads to rot — keep the crown above the substrate.
- Nutrient deficiency in inert substrate; dose root tabs for this heavy feeder.
- Melting of emersed-grown leaves after transition to submersed growth — normal; new submersed leaves follow.
- Loss of red intensity under weak light; increase lighting for stronger colour.