Rotala indica care starts with checking which plant you bought. True Rotala indica, often sold as ‘Bonsai’ or under the older trade name Ammania sp. ‘Bonsai’, has compact, upright stems and small rounded leaves. The name has also been used for Rotala rotundifolia, a different aquarium plant with different growth habits.
This guide focuses on true Rotala indica ‘Bonsai’. Confirm the supplier’s identification before applying care advice intended for another Rotala.
Rotala indica vs. Rotala rotundifolia
Dennerle’s Rotala indica profile explains the longstanding naming confusion. True indica retains closely spaced, oval to round leaves when submerged. Rotundifolia commonly develops longer, narrower underwater leaves, even though its above-water leaves can be round.
| Feature | Rotala indica ‘Bonsai’ | Rotala rotundifolia |
|---|---|---|
| Underwater appearance | Small rounded leaves on upright stems | Usually longer, narrower leaves |
| Growth expectations | Slow, compact growth | More readily forms a bushy stem group |
| Typical use | Trimmed foreground accent or midground group | Midground or background stems |
Leaf shape alone is not a guaranteed identification, especially in a newly purchased plant grown above water. Compare the grower’s label and photographs of submerged growth. Tropica’s rotundifolia profile is a useful comparison.
Care conditions for true Rotala indica
- Temperature: Dennerle lists approximately 72–82°F.
- Water: Dennerle lists pH 5–7 and soft to moderately hard water. Choose livestock with compatible requirements; do not abruptly alter an established aquarium to chase a number.
- Light: Provide an unobstructed position with moderate light. Heavy shade is a poor starting point.
- CO2: Added CO2 can support compact growth, but stable, controlled delivery matters more than maximizing the dose.
- Placement: Leave access for trimming and space between the group and taller plants.
Tropica rates ‘Bonsai’ as a slow-growing stem plant with medium light and CO2 demand. Its listed height is roughly 2–8 inches or more, while Dennerle lists taller eventual growth. Treat height as something you manage with pruning, not a fixed limit.
How to plant it
- Prepare the portion. Remove the pot, packing material and any bundle weight carefully. For tissue-culture plants, follow the supplier’s directions for rinsing away the growing medium.
- Separate the stems. Do not bury an entire tightly packed bunch. Keep healthy leafy tops intact.
- Plant individually. Remove only the leaves that would sit below the substrate. Insert the lower stem gently, leaving the remaining foliage exposed.
- Leave growing room. Start with a small, spaced group so light can reach the lower leaves. Fill gaps later with established cuttings.
Tropica’s planting guide shows the difference between planting individual stems and other plant types. In an empty tank, shallow water makes placement easier; keep exposed plants damp while working.
Choose a substrate that holds the stems securely and plan how nutrients will be supplied. Our planted-tank substrate guide explains the options. Avoid repeatedly uprooting new stems to check for roots.
Lighting, nutrients and red tips
Lower light does not make this plant more compact: Tropica describes larger leaves and looser growth under lower light. Stronger light may bring reddish tips, but a healthy green plant is not a failure.
For a new planted setup, Tropica’s startup guide suggests six hours of light daily at first, increasing gradually toward eight hours. Use a timer and judge the response; extending the day is not a substitute for suitable light at plant level.
Use an aquarium plant fertilizer according to its label and account for the substrate and other plants. Do not add extra iron solely because leaves are pale, or deliberately starve the aquarium of nitrogen to force color. Review the whole setup before changing several inputs at once. For alternative color accents, see our red aquarium plants guide.
Trimming and propagation
Once growth is established, trim healthy tops with clean aquascaping scissors and replant suitable cuttings among the group. Keep leaves on each cutting; stripping the entire stem is unnecessary. Leave healthy rooted lower sections to produce new growth, and remove deteriorating material.
Prune to keep neighboring plants from shading the group. Because growth is slow, allow recovery between substantial trims rather than cutting to a rigid weekly schedule.
Troubleshooting before buying more equipment
- Long gaps between leaves: check shading and light reaching the plant.
- Loose stems: check planting depth, digging fish and the direction of filter flow.
- Deteriorating leaves: remove decaying material and review recent changes, nutrients and growing conditions. One symptom does not identify a specific deficiency.
- Unexpected narrow leaves and rapid growth: recheck the plant’s identity before treating it as unhealthy Bonsai.
Take a photo from the same angle each week to judge new growth. If a CO2 system is installed, prioritize animal safety and investigate any gasping promptly; our aquarium oxygenation guide covers immediate support. Never release aquarium plants or trimmings into natural waterways.
