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Dwarf Baby Tears (Hemianthus callitrichoides 'Cuba')

Dwarf Baby Tears is the iconic iwagumi carpet — the smallest-leaved aquarium plant in the trade, forming a dense lawn of millimeter foliage that pearls with oxygen under bright light. It is also honestly demanding: high light, injected CO2, and fine, fertile substrate are effectively prerequisites, and shortcuts usually end in a yellowing, lifting mat. It is a surprisingly recent discovery, found in Cuba by Danish botanist Holger Windeløv in 2003.

Care specifications

TypeCarpet
DifficultyAdvanced
LightHigh (50–90 µmol PAR)
CO2Required
Fertilizer demandMedium
Growth rateMedium
Max height1 in
Spread4 in
PlacementForeground
Attaches to hardscapeNo
Snail & shrimp safeYes
Temperature68–78 °F
pH6–7.5
ColorGreen
TrimmingRegular
StylesIwagumi, Nature

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Dwarf Baby Tears

Dwarf Baby Tears (Hemianthus Callitrichoides) Pot

$5.99 In stock

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Propagation

Divide a mat into small plugs and plant them in a grid; runners knit the plugs into a continuous carpet.

Frequently asked questions

Can I grow Dwarf Baby Tears without CO2?

Long-term, almost never — submerged HC without CO2 thins, yellows, and dissolves over a few months. The one workaround is the dry-start method: grow the carpet emersed on damp aquasoil for six to eight weeks (it gets unlimited CO2 from air), then flood. Even then, the established carpet holds far better with injection after flooding.

Why did my HC carpet detach and float up in one piece?

HC roots are shallow, and a carpet left untrimmed traps gas and dead growth underneath until buoyancy wins. Trim it down by a third regularly so light reaches the base, avoid uprooting fish like large cories in the carpet zone, and press any lifting edges back in immediately.

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