Propagating Echinodorus cordifolius 'Red Flame'

Propagate the red-marbled 'Red Flame' cordate sword from adventitious plantlets on its arching flower stalk and by crown division, with heavy root-zone feeding.

Overview

'Red Flame' is a cultivar of Echinodorus cordifolius, the spade-leaf sword, a perennial marsh herb that reaches up to 100 cm and bears ovate to elliptic leaves with a base that is truncate to cordate. The cultivar shows broad cordate leaves heavily speckled red over green. It is a rosette sword, not a stem plant, so cuttings do not apply.

E. cordifolius is the only species with arching to decumbent inflorescences, which are often proliferating — a habit well suited to producing daughter plants for propagation, alongside crown division.

Propagation Method: Adventitious Plantlets and Division

For the Echinodorus genus, "propagation is by division or by adventitious new plants developing on submerged flowering stems," and a submersed inflorescence forms plantlets instead of flowers. The arching, often-proliferating flower stalk of cordifolius makes the plantlet route especially productive.

• Adventitious plantlets along the arching flower stalk (inflorescence) — primary method.
• Crown / rhizome division of an established mother plant.

Step-by-Step

1. Let a strong rosette send up its arching flower stalk and keep the stalk submersed so plantlets form along it.
2. Because the stalk arches and proliferates, you can pin a node down to the substrate to help a plantlet root.
3. Wait until each plantlet has several leaves and roots, then cut it from the stalk.
4. Plant the plantlet in deep nutrient-rich substrate, burying only the roots and keeping the crown exposed.
5. To divide, lift the mother, split the rhizome between crowns so each piece keeps roots and leaves, replant, and add a root tab.

Conditions for Healthy Growth

Echinodorus prefer good light and a deep, nutrient-rich substrate, and cordifolius does well in neutral to soft water at tropical to sub-tropical temperatures. 'Red Flame' is a heavy root feeder, so root tabs are essential. Target medium light, 22-28 degrees C, pH 6.0-7.5; CO2 is optional but speeds growth.

Maintenance

Remove old or damaged outer leaves at the base, replenish root tabs regularly given the high nutrient demand, and thin or remove emersed-form leaves that rise above the surface if you want a fully submersed look. Keep the crown clear of substrate.

Common Challenges

• Faded red marbling — typically light or root-nutrient shortage; raise light slightly and feed the root zone.
• Flower stalk grows emersed with no plantlets — keep the inflorescence submersed to trigger adventitious plants.
• Outsized leaves shading the tank — thin the rosette and remove the tallest emersed leaves.