Hygrophila Polysperma Sunset care guide
Hygrophila Polysperma Sunset (Hygrophila polysperma 'Sunset') — medium light, 20-28 °C, pH 6-8, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Hygrophila Polysperma Sunset (Hygrophila polysperma 'Sunset') is a broad-leaved plant of the family Acanthaceae, grown as an aquarium plant. Variegated form of H. polysperma with cream and pink veins on green leaves. Easy fast-growing background plant that adds soft warm tones; tolerates a wide range of conditions.
Taxonomy
- Family: Acanthaceae
- Genus: Hygrophila
- Scientific name: Hygrophila polysperma 'Sunset'
- Common synonyms: Sunset Hygro
Habitat
Hygrophila is a genus of fast-growing stem plants from tropical wetlands of Asia and Africa, rooting in soft to moderately hard waters of marshes, paddies and slow streams. In the Aquairi knowledge base this species is recorded from Asia.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 20-28 °C (68-82 °F)
- pH: 6-8
- GH: 3-14 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 50 cm
- Growth rate: fast
- Nutrient demand: medium
- Recommended placement: background
- Typical trim interval: 10 days
Placement
In aquascapes this plant suits the background. It is a vigorous midground-to-background stem plant; regular trimming keeps it within bounds, and bright light produces compact bushy growth.
Propagation
This species is propagated readily by cuttings and side shoots; trimmed tops replant easily and the base sends up new stems.
Common issues
Rapid growth depletes water-column nutrients, so deficiency holes can appear in older leaves; some species are prone to algae on slow-growing lower portions if light is too intense for the available nutrients.
Propagating Hygrophila polysperma 'Sunset'
Overview
Hygrophila polysperma 'Sunset' (also sold as 'Rosanervig') is a variegated form of H. polysperma, a member of the family Acanthaceae native to Bangladesh, India, China and Malaysia. It is easy to grow and one of the most popular tropical aquarium stem plants, accepting diverse water parameters and developing pink or orange hues near the light. As a cultivar it is multiplied vegetatively, exactly like the parent species.
Propagation Method (Cuttings)
The parent species propagates readily from stem cuttings, produces excessive new shoots quickly, and even an isolated leaf will often root itself. The Sunset cultivar follows the same fast, cuttings-based pattern: top a stem, replant the cutting, and the base produces new shoots.
Step-by-Step
- Cut a healthy top section of 5–10 cm just below a leaf node.
- Strip the lowest leaves to expose clean nodes.
- Push the cutting into nutrient-rich substrate so the bare nodes are buried.
- Leave the base; it will quickly send out new shoots that can be split off later.
- Replant the new shoots once rooted to build a fuller background.
Conditions for Healthy Growth
Growth speeds up under strong lighting, with nutrient-rich substrate and supplemental CO2, though the plant tolerates low-tech tanks well. The variegated pink and cream veins become more pronounced near the light source. Commercially the species is often grown emersed and converts to its softer submersed form once planted underwater.
Trimming & Maintenance
This is a fast grower that needs regular pruning — roughly every week to ten days — to manage its rapid growth and harvest cuttings. Frequent topping keeps the variegated stems bushy and stops the plant from taking light and nutrients away from slower neighbours.
Common Challenges
The main challenge is over-vigour: left untrimmed it shades and outcompetes other plants. Loss of variegation or pale growth usually means the plant is too far from the light or short on nutrients. Reversion to plain green shoots can be pruned out to keep the colourful form dominant.