Rotala H'ra

Overview

Rotala H’ra (a selected form of Rotala rotundifolia) is a prized stem plant grown for its fine, needle-like leaves that flush brilliant orange-red at the tops under the right conditions. It is a fast, vigorous grower that forms a delicate, feathery thicket — one of the most popular “red” plants in aquascaping. The catch is that its signature colour is entirely dependent on high light plus CO2 and iron; grown dimly it is a pretty but ordinary green stem. Give it what it wants and it becomes a fiery centrepiece.

Planting & placement

Rotala H’ra is a stem plant. Plant the stems individually into the substrate with tweezers, a centimetre or two apart, and always in a group — a dense stand of many stems creates the classic bushy red “flame” effect, while a few isolated stems look thin. It works in the midground or background and is often trimmed into a rounded bush. See how to plant aquarium plants for the tweezer technique and aquascaping for beginners for shaping stem groups.

Light, CO2 & ferts

Colour and form both hinge on the setup. Give it high light — our best light for a planted tank guide covers suitable units — and inject CO2 for the compact, intensely coloured growth it is known for. Dose a complete fertilizer rich in iron and micros; the best plant fertilizer options keep the reds saturated. Skimp on any of light, CO2 or iron and the tops revert to green.

Propagation & problems

This is a classic trim-and-replant stem. Snip the tops and push the cuttings straight back into the substrate — they root fast and thicken the group, while the cut stems branch below for extra density. Because it grows quickly, expect frequent trimming. Common issues are green growth from insufficient light or iron, and lower-stem leaf loss from shading — trim regularly so light reaches the base. With high light, CO2 and iron, Rotala H’ra rewards you with one of the most vivid displays in the planted-tank hobby.