Rotala rotundifolia ‘Orange Juice’ is a popular freshwater aquatic stem plant celebrated in aquascaping for its unique, warm peachy-orange and golden-pink tones. This specific cultivar was originally discovered and selected in 2014 by Italian plant enthusiast Massimo Iannella who isolated striking orange shoots from a population of Rotala rotundifolia ‘Colorata’.

Key Overview & Profile:

• Scientific Name: Rotala rotundifolia ‘Orange Juice’
• Plant Type: Stem plant
• Placement: Midground to background
• Growth Rate: Moderate to fast
• Origin: Cultivar selected in Italy (species native to Southeast Asia)

Growth Forms: Emersed vs. Submerged:

Like other Rotala species, ‘Orange Juice’ looks completely different depending on how it is grown:

• Emersed (Above Water): The plant develops round, fleshy leaves. The true beauty of its signature orange colour is already visible in this form.
• Submerged (Underwater): Once adapted to life underwater, the leaves transition into a thin, pointed, and lanceolate (narrow) shape.

Care Requirements & Colour Maximisation:

While standard Rotala rotundifolia is quite hardy, maintaining the vibrant, saturated orange hue of this specific cultivar requires targeted care. Without the right conditions, the plant will slowly revert to a standard olive-green colour.

• Lighting (High): Intense lighting is the primary trigger for the golden-orange coloration. Lower light levels will result in mostly green or pale yellow stems.
• CO₂ Injection (Highly Recommended): While it can survive in low-tech setups, adding 20–30 ppm of carbon dioxide is heavily recommended to achieve a compact growth form and the brightest orange pigmentation.
• Water Parameters: It thrives best in soft to moderately hard water, a pH of 6.0–7.5, and tropical temperatures ranging from 22°C to 28°C. Avoid sudden, drastic shifts in parameters to prevent the leaves from melting.
• Substrate & Fertilization: Plant it into a nutrient-rich aquarium soil or use root tabs. Regular dosing of liquid fertilizers, especially those containing iron, will greatly enhance the warmth and intensity of the orange tones.
• Nitrate Control: Advanced hobbyists often utilize mild nitrate limitation (keeping levels around 5 – 10 ppm). Dropping nitrates causes chlorophyll to break down, allowing the underlying red and orange pigments (anthocyanins) to pop dramatically.

Maintenance & Propagation:

Because it grows quickly, ‘Orange Juice’ serves as an excellent natural filter by soaking up dissolved nitrates and phosphates, helping to prevent algae. However, this means it needs consistent maintenance:

• Trimming: Regular pruning is essential. If left unchecked, the top sections will block out the light, causing the lower leaves to suffocate, turn pale, and drop off.
• Propagation: Simply cut the stem anywhere along its length using sharp aquascaping scissors. Take the top cutting and insert it directly into the substrate. The bottom rooted section will quickly shoot out new, bushier side branches.
• Planting Tip: Separate individual stems from your purchased bundle and plant them roughly half an inch apart. This guarantees that light can pierce all the way through to the base of the stems, forming a thick, uniform bush over time.