Rotala Rotundifolia
Rotala rotundifolia is the gateway 'stem plant' - a fast, bushy background stem that stays green in modest light but blushes orange, pink and red under strong light and CO2.
🗓️ Last reviewed: July 2026
Overview
Rotala rotundifolia is the gateway 'stem plant' - a fast, bushy background stem that stays green in modest light but blushes orange, pink and red under strong light and CO2. It is easy to grow and easy to propagate, which is why it is the plant most people learn to trim and replant with. (Rotala rotundifolia.)
Origin & Natural Habitat
Wetlands, paddies and stream margins across Asia.
Appearance
Slim stems lined with small narrow leaves; grows in dense bushy clusters, greener at the base and warmer-toned at the light-facing tips.
Why People Grow It - Qualities & Benefits
- Fast, bushy background colour
- Turns red/orange under strong light
- Very easy to propagate
- Good nutrient uptake
Care
Light: Moderate for green; high for the pink and red tones.
Water: 20-28°C, pH 6.0-7.5, soft to moderately hard.
Substrate: Nutrient-rich preferred; roots and feeds from the substrate and water column both.
CO₂ & feeding: Optional for green growth; needed for the best red colour and compact form.
Placement: Background and midground bushes.
Extra: ⚠️ Leggy stems with big gaps between leaves mean not enough light. Trim the tops, replant the cuttings densely, and give it brighter light to bush out - do not just let it grow tall and thin.
Propagation
Trim the top few centimetres and replant the cutting; both the cutting and the trimmed stem grow.
Common Problems & Pests
Leggy, pale growth in low light; loses red without strong light/CO2. Trim-and-replant to keep it bushy.
Toxicity & Safety
Non-toxic to livestock; not known to be toxic to cats or dogs. Shrimp-safe.
Best Suited For
- Beginners learning to trim stems
- Colour in high-light tanks
- Fast background bushes
- Aquascaping
FAQ
Why is my rotala green and not red?
Red needs high light (and usually CO2 and iron). In moderate light it stays a perfectly healthy green - the colour is a light response, not a health one.
How do I make it bushier?
Top and replant. Cut the tops, push the cuttings back into the substrate nearby, and the stems branch into a denser bush.