Rotala Sunset care guide
Rotala Sunset (Rotala sp. 'Sunset') — high light, 20-28 °C, pH 5.5-7, CO2 recommended.
Compiled by Aquairi from published sources · Published · Updated
Overview
Rotala Sunset (Rotala sp. 'Sunset') is an aquatic plant of the family Lythraceae, listed in the Aquairi knowledge base as an intermediate-level species. It is typically grown under high light with pressurised CO2 injection on nutrient-rich aquasoil. A sought-after tissue culture variety prized for its stunning pink to orange coloration. Under high light and CO2, the tops glow with warm sunset hues. Forms dense, bushy clusters when regularly trimmed. A rewarding choice for experienced aquascapers seeking vivid color accents.
Taxonomy
- Family: Lythraceae
- Genus: Rotala
- Scientific name: Rotala sp. 'Sunset'
- Common synonyms: Rotala sp. Sunset
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: 20-28 °C (68-82 °F)
- pH: 5.5-7
- GH: 2-10 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 25 cm
- Growth rate: medium
- 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 'Sunset': Cuttings for Warm Color
Overview
Rotala 'Sunset' (a 'Colorata'-type cultivar of Rotala rotundifolia) is prized for warm orange-to-yellow tops. Its parent, Rotala rotundifolia, is in the family Lythraceae, is native to Southeast Asia where it grows as a common weed in rice paddies and wet places, and under strong light its leaves can turn almost wine red. 'Sunset' carries that responsiveness toward orange hues and is propagated exactly like the parent: by cuttings.
Propagation Method
Rotala rotundifolia is propagated by cuttings and forms side shoots willingly, so 'Sunset' multiplies the same way. Cutting the colorful top and replanting it produces a new stem, while the trimmed base branches into several new shoots. This makes a single planting expand quickly into a dense, bushy group.
Step-by-Step
- Cut the top 5-10 cm of a brightly colored stem with clean scissors.
- Strip leaves from the lowest 2-3 cm to free a node.
- Replant each cutting separately in nutrient-rich substrate.
- Leave the trimmed base in place; it will throw out side shoots.
- Maintain strong light and CO2 so new tops develop their sunset color.
Conditions for Healthy Growth
This is an intermediate, medium-growth cultivar. The parent is relatively undemanding but needs good light to produce its red and warm colors; for the 'Sunset' orange tones, strong light, CO2 and adequate iron are what bring out the hue. Provide warm water (about 20-28 °C), soft to moderately hard water, and a nutrient-rich substrate. Note that this cultivar is grown submersed; the submersed leaves are narrow and lanceolate, unlike the rounded emersed leaves of the wild marsh form.
Trimming & Maintenance
Because the plant becomes compact and bushy it blocks light from its lower foliage, so frequent pruning is needed; trim roughly every ten days. Each trim both keeps the group dense and supplies fresh, well-colored cuttings to replant and thicken the stand.