Rotala Rotundifolia (Rotala rotundifolia) Care Guide
Versatile Asian stem plant. Develops pink to red coloration under strong light and CO2, and is easy to shape through frequent trimming.
Overview
Rotala rotundifolia is a stem plant in the family Lythraceae, sometimes called dwarf rotala. Its leaf shape changes dramatically with growth form: emersed plants bear rounded leaves, while submerged growth produces narrow lanceolate foliage that can take on deep pink to red hues under strong illumination.
Taxonomy
- Family: Lythraceae
- Genus: Rotala
- Scientific name: Rotala rotundifolia
Habitat
Native to India, China, Taiwan, Thailand, Laos and Vietnam, where it is a common weed of rice paddies and wet places. The species has spread to the southeastern United States. Natural growth is often emersed in shallow, sunlit water.
Growth requirements
- Lighting: medium to high
- CO2: recommended for compact red growth
- Temperature: 20-28 °C
- pH: 5.5-7.5
- GH: 2-12 °dGH
- Substrate: nutrient-rich
- Maximum height: about 30 cm
- Growth rate: medium
Placement
Used as a background or midground stem plant. Densely planted bunches produce attractive bushy textures and contrasting colour fields, making the species a favourite in Dutch-style and nature aquascapes. Trim frequently to encourage lateral branching.
Propagation
Reproduces vegetatively from cuttings. Trim the upper portion of healthy stems, remove the lowest leaves and plant the cuttings into the substrate; they will quickly develop roots and form new bunches.
Common issues
Light deficiency causes lower leaves to drop, leaving bare stems. Pale or yellowing upper leaves typically signal nitrogen or iron deficiency; balanced liquid fertilisation and CO2 supplementation restore vivid coloration.