Rotala sp. 'Colorata'

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

It is best suited for the midground to background of the aquascape. Planting it in dense groups creates a striking visual impact. It should be placed where it receives unobstructed light to maintain its color. Regular pruning helps keep it in the desired position and shape.

Botanical form

Stem

Submerged leaves are narrow and lanceolate, growing opposite each other on thin stems. Under high light, the foliage turns from light green to a vibrant pinkish-red. Internodes shorten under strong illumination, making the plant look bushier. Emersed growth features rounder, green leaves and small purple flowers.

Growth

Medium

This plant exhibits a fast growth rate, especially under optimal conditions. Frequent trimming is necessary to prevent it from reaching the surface too quickly. Its rapid growth makes it an excellent nutrient exporter, helping to suppress algae. Consistent growth relies on a stable supply of CO2 and light.

Substrate

Low

Rotala sp. 'Colorata' is relatively undemanding regarding substrate and can establish well in inert gravel or sand if adequate water column fertilization is provided. However, using a nutrient-rich aqua soil at a depth of 1.5 to 2 inches (4-5 cm) will significantly boost its growth speed and color intensity. Its fine, fibrous roots easily grasp porous substrate granules, creating a stable foundation that prevents the dense stem clusters from uprooting.

Column fertilization

Recommended

As a stem plant, it efficiently absorbs nutrients directly from the water column. Liquid fertilizers containing a comprehensive mix of elements should be dosed regularly. Daily dosing is preferred to maintain stable nutrient levels in the water. Supplemental iron can be added to the water column to boost pigmentation.

Root fertilization

None

While it feeds heavily from the water, a nutrient-rich substrate promotes stronger, healthier growth. Aqua soils or root tabs provide a reserve of essential minerals for the root system. A healthy root network anchors the fast-growing stems securely. Root feeding is especially beneficial during the initial acclimation phase.

Trimming

Regular

Trim the plant frequently to encourage a bushy, dense appearance. Cutting the stems encourages multiple side shoots to grow from the nodes. Overgrown bushes can be rejuvenated by uprooting, discarding the old bases, and replanting the healthy tops. Trimming in a tiered fashion creates a sense of depth in the layout.

Propagation

Cuttings

Propagation is simple and achieved by taking stem cuttings. Snip the top few inches of a healthy stem and plant it directly into the substrate. The cutting will quickly root and continue growing. Leaving the bottom portion in the substrate will yield new side shoots.

Sensitivity

Moderate

It is generally hardy but can suffer if shaded by taller plants, leading to leaf drop at the base. Sudden fluctuations in CO2 can cause stunted tips or algae growth on the leaves. It prefers slightly acidic, soft to moderately hard water. Extremely low nutrient levels can lead to pale, washed-out foliage.

Layout role

Midground, accent, group

It serves as a beautiful color accent in Dutch and Nature Aquarium styles. Its red and pink hues contrast perfectly with bright green foregrounds and midgrounds. It can be shaped into sweeping bushes or tight clusters. The fine texture of its leaves adds intricate detail to the aquascape.