Echinodorus Reni care guide
Echinodorus Reni (Echinodorus 'Reni') — medium light, 20-28 °C, pH 6-7.5, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Echinodorus Reni (Echinodorus 'Reni') is an aquatic plant of the family Alismataceae, listed in the Aquairi knowledge base as a beginner-level species. It is typically grown under medium light and without obligatory CO2 injection on nutrient-rich aquasoil. A compact red sword plant that maintains its deep wine-red coloration even under moderate light. One of the few truly red rosette plants that stays small enough for midground placement in medium-sized aquariums.
Taxonomy
- Family: Alismataceae
- Genus: Echinodorus
- Scientific name: Echinodorus 'Reni'
- Common synonyms: Red Reni Sword
Habitat
Echinodorus is a genus of New-World aquatic and marsh plants (family Alismataceae) widespread from the southern United States through tropical South America; many cultivated forms are nursery hybrids selected for colour and leaf shape. In the Aquairi knowledge base, populations associated with this form are recorded from cultivated.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 20-28 °C (68-82 °F)
- pH: 6-7.5
- GH: 3-12 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 20 cm
- Growth rate: medium
- Recommended placement: midground
Placement
A heavy root feeder for the midground or background. Nutrient-rich substrate, root tabs and stable parameters drive vigorous growth. Larger varieties require generous spacing. In the Aquairi knowledge base this form is recommended for the midground under medium light and without obligatory CO2 injection, using nutrient-rich aquasoil.
Propagation
Reproduces by adventitious plantlets that develop on flower stalks; once a plantlet has formed several leaves and visible roots it can be separated and planted. Documented propagation techniques for this entry include: horizontal runners.
Common issues
Pale or yellowing new leaves usually indicate iron or other micro-nutrient deficiency; root tabs in nutrient-poor substrates correct most cases.
Propagating Echinodorus 'Reni': Daughter Plants on the Flower Stalk
Overview
Echinodorus 'Reni' is among the smallest of the red Echinodorus, forming a rosette 15-40 cm tall and 15-25 cm wide. Its new leaves are reddish-brown to deep beetroot in colour, and the plant is easy to grow and well suited to small aquariums.
Like all members of the Echinodorus genus, 'Reni' grows as a rosette from a central rhizome and is never propagated by topping or stem cuttings. It multiplies by division or by adventitious daughter plants that form on its submerged flowering stems.
Propagation Method (Adventitious Plantlets / Division)
Echinodorus plants are propagated by division of the crown and rhizome, or by adventitious new plants that develop on submerged flowering stems. A submerged inflorescence produces plantlets along the stalk instead of flowers, while an emersed inflorescence tends to produce flowers and seeds.
- Adventitious plantlets — daughter rosettes that sprout at nodes along a submerged flower stalk and can be separated once they have roots.
- Crown / rhizome division — splitting a mature rosette and its rhizome into rooted, leafed sections.
Step-by-Step
- Grow a healthy 'Reni' under good light until it produces a submerged flower stalk.
- Keep the stalk submerged and let adventitious plantlets develop leaves and roots at the nodes.
- When a plantlet has several leaves and a root tuft, cut it from the stalk.
- Plant the young rosette in a deep, nutrient-rich substrate with the crown sitting above the substrate.
- Alternatively, lift a large mother plant and divide the rhizome into sections, each with roots and leaves, then replant.
Conditions for Healthy Growth
Echinodorus species prefer good light and a deep, nutrient-rich substrate. 'Reni' has only a low CO2 demand, but it requires plenty of light and nourishment for the deep red colour to develop fully. As a heavy root feeder, it responds well to root tabs placed near the rosette.
Maintenance
Trim away old outer leaves at the base to keep the compact rosette neat and encourage fresh red growth. Top up root tabs over time and remove detached plantlets so this small sword does not crowd its neighbours.
Common Challenges
- Emersed-to-submersed transition: nursery plants grown above water may drop early leaves and regrow submersed foliage after planting.
- Faded colour: insufficient light or nutrients keep the red muted, so increase lighting and root feeding for vivid colour.
- Slow plantlet formation: daughter plants only form on a submerged inflorescence, so a plant flowering above water will set seed instead.