Rotala rotundifolia 'Ceylon'

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

This variety is perfect for the midground to background, depending on how aggressively it is trimmed. It has a pronounced tendency to grow horizontally or arch beautifully downwards, making it excellent for softening hardscape edges. Placing it near the flow outlet can accentuate its graceful, swaying appearance in the aquarium.

Botanical form

Stem

The 'Ceylon' variant is characterized by thinner, slightly more delicate green leaves compared to standard rotundifolia. The stems are highly flexible, resulting in a distinctly weeping or arching growth habit rather than growing strictly upright. Under very strong light, the tips of the shoots can develop a subtle, attractive pinkish hue.

Growth

Fast

It shares the rapid growth rate of the standard rotundifolia, quickly filling in empty spaces in the aquascape. Its growth is slightly more sprawling, often sending horizontal runners before reaching for the surface. This fast growth means it requires regular maintenance to keep it from overshadowing smaller, slower-growing plants nearby.

Substrate

Low

Rotala rotundifolia 'Ceylon' requires very little from its substrate, growing excellently in inert materials like sand and gravel as long as basic liquid fertilizers are provided. Its fine, adaptable roots function mostly to secure the slender stems against flow, extracting whatever nutrients are available in the lower levels. A layer of 3 to 4 centimeters of soft substrate creates the perfect foundation for propagating this forgiving and elegant plant.

Column fertilization

Recommended

Liquid fertilization is the most effective way to feed this plant, as its numerous fine leaves absorb nutrients efficiently from the water. A weekly or bi-weekly dose of a comprehensive fertilizer is usually sufficient in low-tech setups, while high-tech tanks require daily dosing. CO2 injection enhances its growth rate and encourages tighter, more compact internodes.

Root fertilization

None

Planting it in a decent substrate provides a good baseline of nutrients, though it is not strictly necessary for survival. It will develop a healthy root system in active aquasoil, which aids in stability after aggressive pruning sessions. Root tabs are generally not required unless the substrate is entirely inert or depleted.

Trimming

Regular

Trimming is essential to manage its sprawling habit and encourage the formation of dense, weeping bushes. It tolerates hard pruning very well; cutting it low will result in a multitude of new side shoots emerging from the stumps. Shaping it into rounded contours complements its natural tendency to arch gracefully.

Propagation

Cuttings

Propagating 'Ceylon' is as simple as cutting healthy stems and replanting them into the substrate. Because it naturally grows horizontally, you can also easily train side shoots to creep along the bottom. Cuttings take root very quickly, often within a couple of days, and immediately begin producing new growth.

Sensitivity

Moderate

Rotala 'Ceylon' is an incredibly robust plant that adapts easily to various water parameters and lighting conditions. It is highly resistant to melting and can tolerate minor fluctuations in temperature and water chemistry. However, dense bushes must be thinned occasionally to ensure water flow and light reach the lower stems, preventing rot.

Layout role

Midground, Background

Its loose, arching growth habit makes it an incredibly valuable plant for creating a natural, slightly wild look in Nature Aquariums. It is often used to spill over rocks or driftwood, creating a soft, cascading visual effect. The contrast between its bright green base and subtle pink tips adds a beautiful nuance to background plant groupings.