Propagating Golden Ammannia (Ammannia pedicellata 'Golden')

How to propagate Ammannia pedicellata 'Golden' (Nesaea 'Golden') by stem cuttings, with the strong light, CO2 and iron it needs and tips to avoid stunting after trimming.

Overview

Ammannia pedicellata 'Golden', long sold as Nesaea pedicellata 'Golden', is a stem plant in the family Lythraceae prized for its gold-yellow foliage under good light. It gives a rare yellow contrast among red and green plants. It is not an easy plant: it needs abundant light, CO2 and a full fertiliser regime to keep its colour.

Like other stem plants it grows upward and is multiplied by cutting and replanting the stems. Because it is a Lythraceae, it can be temperamental about trimming, so propagation needs a gentle hand and patience while the new stems adjust.

Propagation Method

Propagate by stem cuttings: cut the top off a healthy stem, strip the lower leaves, and replant the cutting. The remaining base branches into side shoots. Be cautious, though, because Lythraceae can be triggered to stunt when trimmed, especially when their roots are cut, so handle cuttings carefully and disturb roots as little as possible.

Step-by-Step

1. Select a strong, well-coloured stem and cut a top section several centimetres long.
2. Strip the lowest leaves to expose a clean stem segment for rooting.
3. Replant the cutting into nutrient-rich substrate, avoiding unnecessary root damage to existing plants.
4. Leave the base in place to branch into side shoots for further cuttings.
5. Allow extra time; golden Ammannia takes longer than most stems to grow out and adjust after replanting.

Conditions for Healthy Growth

Golden Ammannia likes reasonably high light, CO2 and the full set of nutrients. It needs a nutrient-rich substrate and benefits from micros and a GH booster. It grows best in medium-soft water, around 160 ppm TDS with KH and GH roughly 4-6. Lythraceae often stay more stable and stunt less at leaner nitrate and trace levels, though tolerance varies between tanks.

Trimming & Maintenance

Trim sparingly and deliberately. Cutting and replanting, which severs roots, is the main trigger for stunting in this plant, so top it only when needed and give the regrowth time. Replant the healthy cuttings to build a fuller group rather than discarding them.

Common Challenges

Stock grown emersed is particularly difficult, taking a long time to convert to fully aquatic form, with many stems dying in the process. Start from submersed-grown, acclimated stems where possible for a smoother propagation.