How to Grow Dwarf Amazon Sword

Dwarf Amazon Sword

Echinodorus tenellus

aquatic plant

Echinodorus tenellus is a small, herbaceous aquatic plant native to South America, commonly used in freshwater aquariums as a foreground plant. It features narrow, delicate green leaves that form dense rosettes, creating an attractive carpet-like appearance when properly established. This plant is valued for its hardy nature and ability to thrive in various water conditions.

Growing Conditions

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Sun: Moderate to high light, 8-10 hours daily from full-spectrum LED or fluorescent aquarium lights

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Water: Consistent water changes of 25-50% weekly; prefers slightly soft to moderately hard water (4-8 dGH); water temperature 72-82°F (22-28°C); tolerates a wide pH range but prefers slightly acidic to neutral

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Spacing: 2-3 inches between plants to allow lateral growth inches

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Days to maturity: 30-45 days to establish runners and form dense carpet

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Planting depth: Plant rosette at substrate surface with roots buried; do not bury the crown

Soil

Type: Nutrient-rich aquarium substrate or sand

pH: 6.0-7.5

Amendments:

Iron supplements Macronutrient fertilizers (NPK) Micronutrient fertilizers Root tabs for substrate enrichment

Growth Stages

Establishment

1-2 weeks

Newly planted rosette develops new root systems and adapts to aquarium conditions; leaves may show slight yellowing or damage from transport

Provide consistent lighting and water conditions; avoid moving the plant frequently; maintain stable water parameters

Vegetative Growth

2-4 weeks

Primary rosette produces new leaves and begins sending out horizontal runners (stolons) from the base

Ensure adequate macro and micronutrient fertilization; maintain strong lighting; increase water column fertilizers if deficiencies appear

Runner Production

3-6 weeks

Stolons extend from the mother plant, each producing small plantlets with their own root systems along the runner

Keep runners pinned down to substrate with weights or plant anchors; maintain nutrient levels; do not trim runners until plantlets are established

Carpet Formation

Ongoing (4+ weeks to full density)

Individual plantlets from runners establish independently and grow upward, creating a dense, cohesive carpet of green foliage

Thin out dense areas if desired; continue routine fertilization; trim taller leaves to maintain carpet aesthetic; remove damaged or dead leaves

Maintenance

Ongoing

Mature carpet requires regular pruning and thinning to prevent overgrowth and maintain shape; plant continues steady growth

Perform weekly or bi-weekly trimming; remove old or decaying leaves; watch for nutrient deficiencies; replant trimmed sections if desired

Companion Planting

Plan your garden →

Plant with:

Anubias nana Hemianthus callitrichoides Glossostigma elatinoides Marsilea hirsuta Lilaeopsis brasiliensis Eleocharis acicularis Rotala rotundifolia

Avoid planting near:

Large cichlids (they uproot delicate plants) Goldfish (they eat and destroy soft plants) Plant-eating herbivorous fish species

Common Pests

Reduce light duration to 8-10 hours; increase water changes; add algae-eating fish (Otocinclus, Amano shrimp); remove visible algae manually; avoid excess nutrients
Remove snails manually; reduce feeding to limit excess organic matter; introduce snail predators if desired; avoid overfeeding
Choose compatible tank mates; anchor plants securely; provide hiding areas for plants; select non-destructive fish species
Dose macronutrient and micronutrient fertilizers regularly; perform bi-weekly water changes of 25-50%; add root tabs; test and adjust fertilization as needed

Uses

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Aquarium Foreground Landscaping

Household

Dwarf Amazon Sword is one of the most popular foreground plants in planted aquariums, creating an attractive carpet that showcases hardscape elements and defines tank layout. Its low growth habit and dense foliage make it ideal for nano tanks and larger aquascapes. [source]

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Habitat and Spawning Substrate

Wildlife

The dense carpet provides shelter and protection for small fish species, fry, and invertebrates, creating natural spawning grounds and refuge areas. Shy or bottom-dwelling species benefit from the cover and grazing opportunities. [source]

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Water Filtration and Biofilm Support

Household

Aquatic plants improve water quality by consuming excess nutrients and producing oxygen while their leaves support beneficial biofilm that provides food for invertebrates and fry. This natural filtration reduces algae growth and maintains stable water chemistry. [source]

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Aquascaping and Aquatic Art

Craft

Hobbyists use Echinodorus tenellus in competitive aquascaping to create naturalistic underwater landscapes, experimenting with carpet patterns, density, and integration with hardscape materials. The plant's responsive growth makes it valuable for creating precise design effects. [source]

Harvest Tips

This plant is not harvested for consumption. However, plantlets can be separated from runners once they develop 3-4 leaves and independent roots, then replanted in desired locations. Trim excess growth as needed to maintain carpet aesthetic and prevent overgrowth that shades other plants.

Fun Facts

🌱 Echinodorus tenellus can reproduce both sexually (via flowers above water if emersed) and asexually (via stolons underwater), making it highly adaptable to different growing conditions.
🌱 This plant can be grown emersed (partially out of water) in terrariums or paludariums, where it develops longer, broader leaves and produces white flowers on aerial stems, a completely different appearance than its submerged form.
🌱 The common name 'Dwarf Amazon Sword' reflects its origin in South American tropical waters; despite being one of the smallest sword plants, it shares the characteristic growth pattern of producing runners, inherited from larger Echinodorus cousins.

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