Propagating Echinodorus cordifolius 'Marble Queen' Sword

How to propagate the white-marbled Marble Queen sword from adventitious plantlets on its flower stalk and by crown division, with root-feeding care tips.

Overview

Echinodorus cordifolius 'Marble Queen' is a large variegated sword — a rosette plant with white-marbled leaves. The species (spade-leaf sword or creeping burhead) is a vigorous grower that can reach substantial size, so it works as a midground centerpiece or a background plant in larger tanks.

Swords are heavy root feeders. They draw nutrients from the substrate and benefit from root tabs at planting, with periodic re-dosing as the plant matures.

Propagation Method

Echinodorus propagates by division and by adventitious plantlets that develop on submerged flowering stems. When the inflorescence forms underwater, small plantlets form instead of flowers — the proliferating flower stalk produces a chain of daughter plants. A mature crown can also be split: dividing the rhizome separates the plant into rooted sections.

Step-by-Step

Grow a healthy parent until it sends up a flower stalk; submerged, this stalk produces plantlets rather than flowers.
Let each plantlet develop several leaves and its own roots while still attached to the stalk.
Separate a rooted plantlet by cutting it free from the inflorescence and plant it in nutrient-rich substrate.
For crown division, lift a mature plant and split the rhizome into sections, each with leaves and roots.
Replant each plantlet or division with the crown at the substrate surface and add root tabs to feed the roots.

Conditions for Healthy Growth

Swords thrive in neutral to soft water and tropical to sub-tropical temperatures, with a rich substrate and good light. Most plants are grown emersed on plant farms, so newly bought stock converts to submerged growth in the aquarium. Strong light and CO2 support the most vigorous growth and flowering.

Maintenance

Remove old or melting leaves after the emersed-to-submerged transition, keep root tabs topped up, and detach plantlets once they are rooted so the parent's energy returns to its own leaves. Divide overcrowded crowns to control size in the midground.

Common Challenges

Emersed-grown leaves may die off before underwater leaves develop, so expect some melt on a new plant.
A depleted substrate starves this heavy root feeder — insufficient root tabs lead to weak, pale growth.
The plant can grow large; without division it may overgrow a midground position.