Gymnocoronis spilanthoides (Senegal Tea Plant) Care Guide
Gymnocoronis spilanthoides is a fast-growing South American stem plant and strong nutrient sink, but a regulated invasive species in the EU.
Compiled by Aquairi from published sources · Published · Updated
Overview
Gymnocoronis spilanthoides, known as the Senegal tea plant, is a vigorous aquatic stem plant of the family Asteraceae, native to South America. It grows quickly, provides cover and acts as a strong nutrient sink. When grown emersed it bears white pompom-like flowers. It is genus Gymnocoronis, first described by Augustin Pyramus de Candolle.
Taxonomy
- Family: Asteraceae
- Genus: Gymnocoronis
- Scientific name: Gymnocoronis spilanthoides
- Common name: Senegal Tea Plant
Habitat
The plant is native to South America, where it grows in wetlands and slow waters. It has naturalised in several regions as an aquarium and ornamental escape and is treated as a potential invasive alien species.
Appearance
It produces elongated, bright green leaves on upright stems and can reach roughly 30–50 cm tall, making it suited to background planting. In the emersed form it flowers with white pompom-shaped heads.
Tank requirements
- Water type: freshwater
- Temperature: 18–28 °C (64–82 °F)
- pH: 6.0–7.5
- GH: 4–16 °dGH
- Lighting: medium to high; 8–12 hours daily
- CO2: not required, but supports lush growth
- Substrate: any; nutrient-rich substrate or liquid fertilisers help
- Placement: background
It is undemanding and grows fast, taking up nutrients rapidly, which makes it useful for nutrient export. Stems are spaced apart at planting to allow for vigorous growth, and frequent trimming is needed to control its size.
Propagation
Propagation is easy and by cuttings: a healthy stem is cut and replanted into the substrate to form a new plant.
Propagating Gymnocoronis spilanthoides (Senegal Tea): Fast Cuttings, Strict Containment
Overview
Gymnocoronis spilanthoides, the Senegal tea plant, is a vigorous stem in the family Asteraceae, native to Brazil, Peru, Bolivia, Paraguay, Uruguay and Argentina. It carries elongated bright-green leaves, produces white pompom flowers when emersed, and grows very fast, acting as a strong nutrient sink in the aquarium.
Propagation Method (Cuttings)
As a stem plant, Gymnocoronis spilanthoides is propagated by cuttings and topping. A cut top is replanted to form a new plant, while the base re-shoots from below the cut. Because it grows so fast, even small fragments root and establish readily — which is exactly why containment matters.
Step-by-Step
- Cut the stem at a node below your desired final height.
- Strip leaves from the lower portion of the cutting.
- Replant the top deeply into the substrate, spacing stems apart.
- Leave the rooted base in place so it sends out new side shoots.
- Collect and contain every trimming — dry or compost it, never flush or dump it.
Conditions for Healthy Growth
The plant is undemanding and beginner-easy: it tolerates a wide temperature band and does not require CO2 to grow. Its appetite for nutrients makes it an effective nitrate and phosphate exporter, but that same vigour means it will quickly fill space if left unchecked.
Trimming & Maintenance
Trim frequently — about every 10 days — to control its rapid growth and keep it from reaching the surface and going emersed. Frequent topping also keeps the stand dense and gives you propagation material.
Common Challenges
The main challenges are not horticultural but regulatory and ecological: the plant is illegal to keep, trade or transport in the EU and is a serious weed in Australia and New Zealand. The growth speed that makes it a great nutrient sink also makes escaped fragments dangerous, so disciplined disposal is non-negotiable.