Staurogyne Repens

Staurogyne repens is a compact, bright-green aquatic stem plant native to Brazil, valued for its bushy foreground growth in freshwater aquariums. It belongs to the family Acanthaceae and develops short stems with small, oval-to-oblong green leaves. Rather than forming a perfectly flat carpet through runners, it spreads gradually through lateral shoots and branching stems, creating a dense, low-growing foreground when trimmed regularly. Its compact growth makes it suitable for nano aquariums, nature-style aquascapes, and planted community tanks. With appropriate lighting and nutrients, it can form attractive green clusters around rocks and driftwood.

Yes, Staurogyne repens can grow without injected CO₂, although supplemental CO₂ generally encourages faster, denser, and more compact growth. Its performance depends on the balance between light, carbon availability, and nutrients.

• Low-tech aquarium: Aim for approximately 20–40 µmol/m²/s PAR at the substrate, with stable nutrients and moderate lighting.
• CO₂-injected aquarium: Approximately 40–70 µmol/m²/s PAR can support denser growth when fertilisation and carbon supply are balanced.
• CO₂ concentration: A commonly used starting target for high-tech planted aquariums is around 20–30 ppm, provided livestock can tolerate it.
• Lighting duration: Start with 6–8 hours daily and adjust according to plant growth and algae.
• Without CO₂: Expect slower growth and potentially taller, less compact stems.

PAR figures refer to light reaching the plant at substrate level, not the manufacturer's advertised output. Watts per litre is an unreliable comparison across different LED fixtures, so PAR is the more useful measurement. Beginners should prioritise stable conditions over high light intensity.

Staurogyne repens generally performs well in stable freshwater aquariums with temperatures around 20–28°C and a slightly acidic to neutral pH. Maintaining consistent conditions is more important than achieving an exact numerical target.

Recommended starting parameters:

• Water temperature: 20–28°C
• pH: Approximately 5.5–7.5
• General hardness (GH): Approximately 3–12 dGH
• Carbonate hardness (KH): Approximately 1–8 dKH
• Lighting: Adjust PAR to the aquarium's CO₂ availability and algae levels.

These are practical starting ranges rather than strict biological limits. In warmer parts of India, aquarium water may exceed 28°C during summer, particularly in rooms without air conditioning. Monitor the actual water temperature instead of relying on room temperature, and maintain good circulation when conditions become warm. Avoid sudden changes in pH, hardness, or temperature, especially after introducing newly delivered plants.

Plant individual Staurogyne repens stems approximately 2–3 cm apart, then trim established growth to encourage branching and a fuller foreground. Proper spacing reduces overcrowding and gives each plant room to establish its roots.

1. Separate the plant into manageable rooted stems or small individual portions.
2. Use planting tweezers to insert the roots into the substrate without burying the leaves.
3. Maintain approximately 2–3 cm between planting points to encourage even coverage.
4. Once the plants establish themselves, trim excessively tall stems above a healthy leaf node.
5. Replant suitable healthy cuttings in open areas to expand the planting.

Staurogyne repens generally develops a bush rather than a perfectly level lawn. Regular trimming encourages lateral branching, while insufficient light can cause taller, weaker growth. Avoid trimming newly planted specimens aggressively before they establish roots. For a compact appearance, trim gradually and allow new side shoots to develop between sessions.

Initial melting can occur when Staurogyne repens transitions from emersed nursery growth to submerged aquarium growth, but persistent deterioration usually warrants checking the growing conditions.

Common causes include:

• Transition stress: Older leaves may deteriorate while new submerged leaves develop.
• Insufficient light: Weak illumination can lead to elongated stems and loss of lower leaves.
• Nutrient deficiencies: Yellowing or pale new growth may indicate an imbalance in nutrient availability.
• Poor root establishment: Stems that are planted too deeply, disturbed repeatedly, or unable to anchor properly may struggle.
• Excessive light without adequate carbon: Strong lighting can encourage algae and create conditions in which the plant struggles to maintain healthy growth.

Remove severely damaged foliage and check the plant for healthy new shoots before discarding it. Review lighting, fertilisation, and water stability together rather than making several drastic changes at once. New submerged growth is a more reliable recovery indicator than the condition of older leaves alone.

Staurogyne repens is a good choice for a bushy, low-growing foreground, while Monte Carlo and Dwarf Baby Tears are better known for forming creeping carpets under suitable conditions. The best option depends on the desired aquascape and the available equipment.

• Staurogyne repens: Produces compact green bushes and spreads through branching and lateral shoots. It can grow without injected CO₂, although growth is generally slower.
• Monte Carlo (Micranthemum tweediei): Spreads through creeping stems and can form a connected carpet. Adequate light and CO₂ help achieve faster, denser coverage.
• Dwarf Baby Tears (Hemianthus callitrichoides 'Cuba'): Forms a very fine-textured carpet but is generally more demanding and benefits from strong lighting, stable CO₂, and careful maintenance.
• Staurogyne sp. 'Bihar': A separately traded aquarium plant name that should not automatically be treated as synonymous with Staurogyne repens. Verify the supplier's botanical identification before comparing growth habits or care requirements.

Choose Staurogyne repens if you prefer a natural, bush-like foreground with relatively straightforward maintenance rather than a uniformly flat carpet.

Staurogyne repens is available from TropicalZone with delivery across India. Before ordering, check the portion format, shipping estimate and live-arrival policy on the product page, because a portion of individual stems differs substantially from a rooted clump or established plant.

Prepare the aquarium before the plants arrive and introduce them promptly under suitable water and lighting conditions. If you are building a foreground, consider the space available, your lighting intensity and whether you use injected CO₂ before deciding how many plants to buy.