Rotala rotundifolia 'Green'

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

It is ideal for midground to background placement in most aquariums. It forms dense, bright green thickets when planted in groups. Its cascading growth habit makes it suitable for creating flowing visual effects. It can be trained to creep along the substrate or hardscape under very high light.

Botanical form

Stem

It features narrow, elongated leaves that are a consistent, vivid bright green. Under strong light, the stems may arch downwards, giving it a weeping appearance. Internodes remain relatively compact compared to other fast-growing stems. Emersed leaves are rounder and slightly thicker.

Growth

Fast

This plant is extremely fast-growing, requiring regular maintenance. Its vigorous growth helps outcompete algae by rapidly consuming excess nutrients. Frequent trimming is necessary to keep the layout looking neat. Optimal light and CO2 will maximize its growth potential.

Substrate

Medium

Rotala rotundifolia 'Green' benefits from a moderately fertile substrate, which promotes the growth of dense, healthy green thickets. Planting in 2 to 3 inches (5-7 cm) of fine-grained aqua soil provides the perfect environment for its extensive root network to establish quickly. A porous substrate helps prevent compaction, allowing the roots to efficiently absorb essential micro and macronutrients needed for vigorous stem development.

Column fertilization

Recommended

It feeds heavily from the water column, making liquid fertilization essential. A standard all-in-one fertilizer usually provides everything it needs. Ensure sufficient potassium to prevent pinholes in older leaves. Daily or regular dosing maintains its fast growth and bright coloration.

Root fertilization

Optional

A fertile substrate enhances its overall robustness and root development. Soil-based substrates or root tabs provide excellent supplemental nutrition. Strong roots help the plant stay anchored despite its rapid vertical growth. However, it can still thrive in inert substrates if column dosing is adequate.

Trimming

Regular

It is extremely tolerant of heavy pruning. It can be trimmed down to a few inches, and it will quickly rebound with multiple side shoots. Regular shaping helps create dense, beautifully rounded bushes. Replanting the tops is an easy way to refresh an old, woody stand.

Propagation

Cuttings

Propagation is easily achieved through stem cuttings. Simply cut the healthy tops and insert them into the substrate. The original stem will produce lateral branches, increasing the density of the bush. It is one of the easiest stem plants to multiply.

Sensitivity

Moderate

It is very forgiving and adaptable to a wide range of water parameters. However, poor flow or severe shading can cause the lower sections to deteriorate. It is susceptible to hair algae if nutrients and CO2 are unbalanced. It prefers stable temperatures and clean water.

Layout role

Midground, Background

It acts as an excellent bright green background filler or midground bush. It provides a stark, fresh contrast against red or dark green plants. It is commonly used in Nature Aquariums to create lush, green rolling hills. Its weeping habit under high light can soften hardscape edges.