Rotala sp. "Long Leaf"

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

Given its impressive vertical growth and sizable leaf span, it is best placed in the background of the aquarium. It should be planted in small groups with some space between individual stems to ensure light penetrates down to the lower leaves. It needs an open area where it won't be shaded by neighboring plants to maintain its lower foliage. Its unique leaf shape makes it an excellent standalone feature plant.

Botanical form

Stem

This plant is defined by its distinctively long, narrow, lanceolate leaves that grow opposite one another along a relatively thick stem. The leaves gracefully arch downwards, giving the plant a somewhat weeping or relaxed appearance. Under intense illumination, the foliage takes on beautiful reddish-orange to pink hues. In its emersed form, the leaves are broader, shorter, and primarily green.

Growth

Fast

It exhibits a moderately fast growth rate when provided with high light, CO2, and abundant nutrients. While it grows vertically quite readily, it is not as aggressively invasive as standard Rotala rotundifolia varieties. This moderate pace makes it slightly easier to manage and prune. However, if conditions are sub-optimal, its growth will slow considerably and the lower stem will begin to degrade.

Substrate

Medium

Rotala sp. "Long Leaf" thrives in a moderately rich aqua soil that can support its elongated leaves and sturdy stems. A substrate depth of about 2 inches (5 cm) is recommended to properly house its developing root system. The plant's roots naturally seek out porous, uncompacted areas in the substrate to extract the necessary macronutrients, leading to a much thicker and more robust overall plant structure.

Column fertilization

Recommended

It benefits immensely from a comprehensive liquid fertilization regime. Because of its large leaf surface area, it efficiently absorbs nutrients directly from the water column. Daily dosing of trace elements, especially iron, helps maintain the vibrancy of its colored leaves. Maintaining steady potassium levels will prevent the development of pinholes in the older, lower leaves.

Root fertilization

None

A nutrient-rich substrate, such as a quality aquasoil, is highly recommended to support this plant's robust structure. A strong root system helps anchor its thick stems and provides a reliable secondary source of nutrients. Root tabs can be very beneficial in older setups to rejuvenate growth and enhance stem thickness. Strong root feeding contributes significantly to the overall health and size of the leaves.

Trimming

Occasional

Trimming should be approached by cutting the main stem and allowing lateral shoots to develop from the nodes below. Because of its larger leaf size, it takes a bit more time to look natural after a hard trim compared to fine-leaved species. Replanting the tops is the preferred method to maintain the best visual appearance and stem thickness. Discarding the woody, leafless bottom portions during a rescape will keep the stand looking fresh.

Propagation

Cuttings

Propagation is simple and is done by taking stem cuttings. Cut the top portion of a healthy stem and plant it deeply into the substrate to prevent it from uprooting. The original cut stem will slowly produce one or two new shoots from the highest remaining node. Ensure the cuttings have enough space to receive light to their base to encourage quick rooting.

Sensitivity

Moderate

It is moderately sensitive to poor water circulation and shading, which quickly lead to the lower leaves rotting and falling off. It requires stable CO2 levels; fluctuations can cause the new leaves to curl or stunt. It prefers softer water parameters and a slightly acidic pH. If the lighting is insufficient, the plant will lose its warm colors and revert to a pale, uninspiring green.

Layout role

Midground, Background

Its unique, long, drooping leaves provide a fantastic textural contrast to both fine-leaved and broad-leaved plants in the aquascape. It serves as a beautiful background accent that adds a touch of elegance and warm color. Its structure is less dense than bushy Rotalas, making it ideal for a more relaxed, loose planting style. It draws the eye upward and adds vertical interest to the design.