Rotala Pulchra care guide
Rotala Pulchra (Rotala pulchra) — high light, 22-28 °C, pH 5.5-7, CO2 recommended.
Compiled by Aquairi from published sources · Published · Updated
Overview
Rotala Pulchra (Rotala pulchra) is an aquatic plant of the family Lythraceae, listed in the Aquairi knowledge base as an advanced-level species. It is typically grown under high light with pressurised CO2 injection on nutrient-rich aquasoil. A rare, fine-leaved Rotala species with a delicate, compact growth habit. Slow-growing compared to most Rotala species, prized by collectors for its refined appearance in mature aquascapes.
Taxonomy
- Family: Lythraceae
- Genus: Rotala
- Scientific name: Rotala pulchra
- Common synonyms: Beautiful Rotala
Habitat
Rotala is a genus of small marsh plants (Lythraceae) distributed across the Old-World tropics, from India and South-East Asia to tropical Africa and northern Australia. Many forms occur in rice paddies, ditches and seasonally flooded lowlands. In the Aquairi knowledge base, populations associated with this form are recorded from Southeast Asia.
Growth requirements
- Lighting: high
- CO2: recommended
- Temperature: 22-28 °C (72-82 °F)
- pH: 5.5-7
- GH: 2-8 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 20 cm
- Growth rate: slow
- Recommended placement: midground
Placement
A background or midground stem. Bright light combined with CO2 injection brings out the orange, pink and red tones for which Rotala is grown; lean nitrogen and abundant micros sharpen the colour further. In the Aquairi knowledge base this form is recommended for the midground under high light with pressurised CO2 injection, using nutrient-rich aquasoil.
Propagation
Pinched off and replanted cuttings root in days; periodic topping creates the dense bushy cluster characteristic of Dutch- and nature-style layouts. Documented propagation techniques for this entry include: stem cuttings.
Common issues
Small upright leaves and pale tips indicate insufficient light or CO2; reducing nitrate slightly while raising iron tends to intensify the red pigments.
Propagating Rotala pulchra: A Cuttings Guide
Overview
Rotala pulchra is a fine-leaved stem plant in the genus Rotala, family Lythraceae (the loosestrife family) of around 46 species, several of which are grown as aquarium plants in both submerged and emergent conditions. It is a slow-growing, collector-grade red Rotala that demands strong light to reach its deepest tones. Propagation is by cuttings, the standard method for Rotala stem plants.
Propagation Method (Cuttings)
As a Rotala, this species multiplies through stem cuttings: a topped section roots on its own, and the parent base branches into multiple new shoots below the cut. This natural branching is exactly what creates the dense red bushes prized in mature aquascapes, so topping is both a propagation step and a styling tool. Growth is slower than typical Rotala, so be patient between rounds.
Step-by-Step
- Select a vigorous, well-coloured stem and cut the top 5–10 cm with clean scissors.
- Strip the leaves from the lower 2–3 cm so the buried stem stays clean.
- Plant the bare base 2–3 cm into nutrient-rich substrate, keeping cuttings slightly apart for flow.
- Leave the parent stem to branch from the nodes below the cut.
- Maintain strong light, steady CO2 and lean nitrate so the new shoots colour up as they grow.
Conditions for Healthy Growth
This is a high-tech plant: 22–28 °C, soft slightly acidic water (pH ~5.5–7), high light and injected CO2. Coloration is driven mainly by light — more light over the tank yields more pigment — and CO2 encourages the branching that builds bushy growth. For redder tones keep nitrate modest, since excess nitrogen pushes Rotala greener; good fertiliser already supplies ample iron, so prioritise light, CO2 and flow over dosing extra iron.
Trimming & Maintenance
Trim roughly every three weeks, reflecting the slow growth. Top below the surface, replant the cuttings to thicken the group, and let the bases branch into a denser stand. Keep conditions stable between trims — sudden swings in light or CO2 stress this species and dull its colour.
Common Challenges
- Green instead of red: too little light or too much nitrate — raise light and lean out nitrogen.
- Stunted or stalled tips: unstable CO2 or fluctuating conditions; stabilise the tank before trimming.
- Slow recovery after topping: expected for this slow grower — give the base more time to branch.
- Initial melt on imported or emersed-grown stems: a normal transition as it adapts to submersed growth.