Staurogyne repens: the forgiving foreground plant
It stays compact without demanding CO₂, tolerates a range of light, and gets denser every time you trim it — a foreground plant that actually works in a community tank.
Where it comes from
Staurogyne repens was introduced to the aquarium trade around 2008 after specimens collected in the Rio Cristalino, a clear-water tributary of the upper Rio Tapajós in Mato Grosso, Brazil, were identified as a useful foreground plant. The species itself had been described botanically in the 19th century, but it was essentially unknown in the hobby until that collection. It grows submerged or partially submerged in the shallows of clear, warm Brazilian rivers, where it receives good light filtering through shallow water.
Despite being a relatively recent addition to the trade, it has become a staple foreground plant because it uniquely occupies a niche between demanding carpet plants (HC Cuba, Monte Carlo) and taller midground stems — staying low and compact without requiring CO2 injection or specialist light levels.
What to expect
Staurogyne repens grows as a compact, branching stem that spreads along the substrate surface. Leaves are small (1–2 cm), oval, bright green, and slightly wavy at the margin, arranged opposite each other on short internodes. The plant rarely exceeds 5–8 cm in height when regularly trimmed, though untrimmed stems will reach 10–15 cm.
It produces small white flowers when grown emersed or when stems break the water surface — an attractive bonus in open-top tanks. The plant branches vigorously after trimming, with multiple new shoots emerging from each cut node. This makes it more productive with regular cutting than if left to grow untrimmed.
There are no commonly traded varieties, though some shops sell a slightly larger form under the same name. It is occasionally confused with Staurogyne porto velho, which is a narrower, paler plant with a different growth habit.
How to keep it
| Parameter | Value |
|---|---|
| Lighting | Medium — grows in low light but stays more compact with medium to high light |
| CO2 | Not required; grows notably faster and more compactly with CO2 |
| Temperature | 20–28°C |
| pH | 6.0–7.5 |
| Hardness | Soft to moderately hard (2–15 °dH) |
| Fertiliser | Benefits from regular macro and micro dosing; root tabs useful in inert substrate |
| Substrate | Any — grows in gravel, sand, or aquasoil; aquasoil encourages faster growth |
| Growth rate | Slow to moderate — trimmable every 3–4 weeks |
| Placement | Foreground, Midground |
| Difficulty | Medium |
Where it works best
Staurogyne repens is most useful planted in the foreground or low midground where its compact habit creates a structured green base. It works particularly well as a transitional plant between a foreground carpet (or bare substrate) and taller midground stems or rocks, filling the space with a natural-looking low mound rather than an abrupt height jump.
In tanks without CO2 injection it is one of the few reliable foreground plants that stays genuinely low — HC Cuba tends to grow upward rather than carpeting without CO2, while Staurogyne repens spreads more naturally along the substrate even at moderate light levels.
It also works well around hardscape: plant it at the base of rocks or wood where it will spread outward and soften the edges, mimicking the way plants colonise rock surfaces in nature.
How to propagate
Trimming is propagation: cut stem tips 3–5 cm long, remove the lowest pair of leaves, and replant the cuttings. They root within a week and grow away normally. The parent plant will branch from the cut node, producing 2–4 new shoots. Over several trimming cycles a small initial planting fills out into a dense group.
Runners are occasionally produced from the base, particularly in soft water or active substrate. These can be separated and replanted once they have 3–4 leaf pairs and are beginning to develop their own roots.
What goes wrong
Leggy growth, wide internodes. Insufficient light. Move to a brighter spot or trim more aggressively — trimming forces lateral branching from lower nodes that receive better light.
Yellowing leaves. Nutrient deficiency, most commonly nitrogen or iron. Increase fertilisation; if using inert substrate, add root tabs near the planting.
Slow to spread. Normal behaviour without CO2. It will spread, just over weeks rather than days. Patience and regular trimming are more effective than adjusting other parameters.
Leaves turning dark or rotting at the base. Poor flow around the lower plant, or debris accumulation. Ensure gentle but consistent circulation reaches the substrate level around the planting. Trim and replant fresh cuttings if the base becomes woody and bare.
More plants in this series
- HC Cuba (Hemianthus callitrichoides) — the finest carpet available
- Pogostemon helferi (Downoi) — the star-shaped foreground plant
- Monte Carlo (Micranthemum tweediei) — fine-leaved carpet, moderately demanding
- Eleocharis parvula (Dwarf hairgrass) — the grass-effect carpet
- Java moss (Taxiphyllum barbieri) — the moss that goes anywhere