Echinodorus argentinensis Care Guide
Echinodorus argentinensis is a robust subtropical sword from southeastern South America with broad ovate leaves, tolerating cooler water than most tropical swords.
Compiled by Aquairi from published sources · Published · Updated
Overview
Echinodorus argentinensis is a large, robust sword plant in the family Alismataceae from South America. It forms a strong upright rosette of broad green leaves; the blade is ovate, described as about 15-26 cm long and 7-15 cm wide with 7-13 veins and distinct pellucid lines. It is grown as a background specimen and is noted for tolerating cooler conditions than most tropical Echinodorus.
Taxonomy
- Family: Alismataceae
- Genus: Echinodorus
- Scientific name: Echinodorus argentinensis
- Author: Rataj
Habitat
The species is native to subtropical southeastern South America, including Argentina. As with other Echinodorus it is a wetland plant of slow rivers, ponds and marshes that grows submersed or emersed depending on water level; its subtropical range underlies its tolerance of cooler temperatures.
Tank requirements
- Temperature: 18-26 °C (64-79 °F); tolerates cooler water than tropical swords
- pH: 6.0-7.5
- GH: 4-16 °dGH
- Lighting: medium to high
- CO2: not required
- Growth rate: medium
- Maximum height: about 50 cm
- Placement: background specimen
Planting and care
It is a heavy root feeder and benefits from a nutrient-rich substrate or root tabs, with iron-bearing fertilisation preventing leaf yellowing. Because it tolerates lower temperatures, it suits cooler or unheated subtropical setups as well as standard tropical tanks. Given its size it should be placed with room to develop as a solitary background plant.
Propagation
Propagation is vegetative, by adventitious plantlets on flower stalks and by division of the rootstock; daughter plants are separated and replanted once rooted.
Propagating Echinodorus argentinensis (Argentine Sword)
Overview
Echinodorus argentinensis is a robust subtropical sword from Argentina, growing as a perennial rosette of broad oval leaves. Like other Echinodorus, it can grow submersed, emersed or seasonally, and tolerates cooler water than most tropical swords. A mature plant forms a stout crown and, with age, a rhizome from which new plantlets can arise.
It is a heavy root feeder that grows best in a deep, nutrient-rich substrate with good light. These same conditions that drive strong growth also fuel the vigorous flowering stems and rhizome that you will use to propagate it.
Propagation Method
There are two reliable routes. The genus reproduces by division or by adventitious new plants developing on submerged flowering stems. When a large sword sends up a flower stalk, the submersed section grows small plantlets instead of flowers; you can also split the mature crown and rhizome.
Step-by-Step
- Wait for a mature plant to send up a flowering stem and keep that stem submersed so plantlets form along it.
- Allow each adventitious plantlet to develop its own leaves and a root system in the water.
- When a plantlet has roots, remove that plantlet from the stalk and plant it in nutrient-rich substrate.
- When all the plantlets are gone, remove the spent stalk.
- To divide instead: lift the mature plant, and when trimming old leaves cut a section of the rhizome bearing a crown or new plantlets.
- Replant each division with its roots in deep substrate, leaving the crown above the surface of the soil.
Conditions for Healthy Growth
- Deep, nutrient-rich substrate for this heavy root feeder.
- Good light to support fast growth and flowering stems.
- Cooler-tolerant temperatures (roughly 18-26 C) suit this subtropical species.
- Soft to moderately hard water in a near-neutral pH range.
Maintenance
Trim old and dying leaves at the base to keep light reaching the crown. Because it feeds through the roots, replenish substrate nutrients periodically. Remove flowering stems only after their plantlets have been detached, so you do not waste developing daughter plants.
Common Challenges
- Plantlets rotting if detached before they grow roots - wait until a root system forms.
- Slow or stalled growth in lean substrate, since this is a heavy root feeder.
- Crowns failing to root after division if buried too deep - keep the crown above the substrate.