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Narrow-Leaf Chain Sword (Helanthium tenellum)

The narrow-leaf chain sword is the fastest natural lawn for a medium-light tank: grass-like rosettes that fire off runner after runner until the foreground is a meadow. It is more forgiving than true carpet plants — no CO2 required — though it rewards a nutrient-rich substrate and turns bronze under strong light.

Care specifications

TypeRosette
DifficultyEasy
LightMedium (30–60 µmol PAR)
CO2Beneficial, not required
Fertilizer demandMedium
Growth rateFast
Max height4 in
Spread6 in
PlacementForeground
Attaches to hardscapeNo
Snail & shrimp safeYes
Temperature68–82 °F
pH6–7.5
ColorGreen
TrimmingRegular
StylesNature, Biotope, Iwagumi

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Narrow-Leaf Chain Sword

Narrow-Leaf Chain Sword (Echinodorus tenellus)

$6.99 In stock

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Propagation

Runs aggressively via chains of plantlets; snip and replant daughters to direct the spread, or let it colonize.

Frequently asked questions

How quickly will chain swords carpet my foreground?

In a fertile substrate with solid medium light, a handful of starter plants can cover a couple of square feet in two to three months — runners appear within weeks of planting. Without root nutrition the spread slows dramatically, so root tabs are the cheapest accelerator.

Why is my chain sword growing taller than expected?

In lower light the leaves stretch to five inches or more, reaching for energy. Stronger light keeps rosettes squat at two to three inches and brings out a reddish-bronze tint. If it has already stretched, improve the light and trim — new growth comes in shorter.

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