Rotala Butterfly Care Guide: Bi-Coloured Compact Stems
Rotala ‘Butterfly’ has earned a devoted following for good reason — its distinctively bi-coloured leaves, green on top and pink to red underneath, create a layered visual effect that shifts as the plant sways in the current. Compact and manageable, it suits tanks of all sizes without the aggressive growth rate that makes some Rotala species a trimming nightmare. This rotala butterfly care guide from Gensou Aquascaping at 5 Everton Park, Singapore, covers the care essentials to keep this attractive stem plant at its vibrant best.
Plant Profile
Rotala ‘Butterfly’ is a cultivar within the Rotala genus (family Lythraceae) that has gained rapid popularity in Asian aquascaping circles. Its rounded leaves are smaller than those of Rotala rotundifolia, and the growth habit is noticeably more compact. The defining feature is the bi-coloured leaf: a green upper surface that transitions to pink, magenta or red on the underside, depending on light intensity and nutrient availability.
Growth rate is moderate — roughly 2–3 cm per week under good conditions. This makes it more manageable than species like Rotala wallichii while still filling in a background or midground position effectively.
Lighting
Moderate to high light is needed for the best colour expression. At 60–90 PAR, the pink and red undersides develop strongly. Under lower light, the plant grows well but stays predominantly green, losing the bi-coloured effect that defines the variety. A quality LED in the 6500–8000K range provides the right spectrum.
Position the plant where it receives direct light without heavy shading from taller species. In densely planted tanks, periodic thinning of neighbouring stems ensures Rotala ‘Butterfly’ gets the photons it needs.
CO2 Injection
Pressurised CO2 at 20–30 ppm produces the best results. The plant can survive without CO2 injection, but growth slows substantially and colouration fades to a uniform green. If you are running a low-tech setup, consider liquid carbon supplements as a partial alternative — they support modest growth, though the results will not match a pressurised system.
In Singapore’s warm water (26–30 °C), CO2 dissolves less efficiently than in cooler tanks. Use an inline diffuser or a quality ceramic diffuser positioned near the filter outlet to maximise dissolution.
Nutrient Requirements
A balanced fertilisation regime drives healthy bi-coloured growth. Nitrate at 10–20 ppm, phosphate at 1–2 ppm, and potassium at 10–20 ppm form the macro targets. Iron is particularly important for red colouration — dose chelated iron to maintain 0.1 ppm, supplementing with a comprehensive micronutrient mix two to three times weekly.
Lean dosing starves the pink out of the leaves. If your Rotala ‘Butterfly’ looks uniformly green under high light, inadequate iron or nitrogen is usually the culprit. Increase dosing incrementally and observe changes over two weeks.
Planting and Placement
Plant stems individually, spaced 2 cm apart, into a nutrient-rich substrate. ADA Amazonia or similar aquasoils provide root-zone nutrition that complements water column dosing. Use planting tweezers to insert each stem 2–3 cm deep — the delicate stems bend easily if handled roughly.
Rotala ‘Butterfly’ works beautifully as a midground to background plant. In nature-style aquascapes, place it behind rocks or driftwood where the bi-coloured foliage adds depth. In Dutch layouts, it pairs strikingly with contrasting textures like Gratiola viscidula or broad-leaved Hygrophila.
Trimming
Trim the top 5–8 cm when the plant reaches the water surface, and replant the cuttings. Each trimmed stem produces two or more side shoots, gradually building a dense, bushy cluster. After three or four trim cycles, uproot the entire group, select the healthiest tops and replant fresh — old stems with multiple branch points become woody and less attractive.
Trimming every two to three weeks keeps the growth compact and the colour intense. Neglected stems that reach the surface and grow emersed lose their submersed leaf form and colour.
Troubleshooting
Dropping lower leaves indicate either insufficient light penetration or nutrient deficiency at the roots. Thin the cluster to allow light to reach the base, and consider root tab supplementation if your substrate is more than a year old. Stunted tops with twisted leaves often signal a calcium deficiency — check GH and supplement accordingly.
Green spot algae on the leaves usually points to low phosphate. Increase PO4 dosing and the algae pressure typically recedes within a week or two.
A Versatile Colour Accent
Rotala ‘Butterfly’ occupies a sweet spot: colourful enough to serve as an accent, manageable enough to not dominate maintenance time, and compact enough for tanks from 40 litres up. It is a plant that rewards consistent care with genuinely eye-catching foliage. For planted tank design and plant sourcing in Singapore, Gensou Aquascaping is here to help.
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