Echinodorus 'Rubin Narrow' Propagation: Plantlets and Crown Division

How to propagate the red sword Echinodorus 'Rubin Narrow' from adventitious plantlets on the inflorescence and by crown division in a freshwater aquarium.

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

1. Grow the mother plant strongly until it sends up a flower stalk (inflorescence).
2. Leave the stalk in place; adventitious plantlets will form along its nodes.
3. Let each plantlet grow several leaves and a small root bundle before separating.
4. Cut the plantlet from the stalk with clean scissors.
5. Plant it in nutrient-rich substrate, burying the roots but NOT the crown.
6. 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.