Echinodorus angustifolius

Scientific name: Echinodorus angustifolius

Family: Alismataceae

Usual maximum size in aquariums: 5 - 30 cm (1.97 - 11.81 inch)

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Recommended pH range for the species: 5.7 - 7.4

Recommended water hardness (dGH): 4 - 18°N (71.43 - 321.43ppm)

0°C 32°F30°C 86°F

Recommended temperature: 21 - 30 °C (69.8 - 86°F)

Reproduction of the plant: Runners

Origin (in the wild): South America

How fast these plants grow: Normal

Recommended substrate: Gravel

Demands on lighting: Medium

Ideal placement in a fish tank: Middle

Common Names

Narrow-Leaf Sword

Origin

Echinodorus angustifolius originates from South America, especially in Brazil’s tropical regions. It naturally grows along riverbanks and in wetlands, where it adapts well to both submerged and emersed conditions, making it a versatile choice for aquariums and paludariums.

Quick Overview

• Ideal For: Aquariums, paludariums
• Difficulty Level: Easy
• Lighting: Medium

Growing Conditions

Echinodorus angustifolius grows well when fully submerged in aquariums and can also thrive emersed in humid environments. With its narrow, grass-like leaves reaching up to 30 cm (11.81 inches), this plant is ideal for the middle of an aquarium, where it adds texture and height. It does best in a gravel substrate, which supports its root system, and prefers medium lighting for healthy growth. Though not demanding, it will grow faster and develop a more vibrant appearance under stable water conditions within the pH range of 5.7 to 7.4.

Planting Area

This plant is suitable for midground placement in most aquariums. It serves as an attractive focal point, providing a natural look with its long, slender leaves that sway with water movement. In larger aquariums, it can create a lush, layered effect when placed among other mid-sized plants.

Propagation

Propagation of Echinodorus angustifolius is straightforward. The plant reproduces through runners, which extend horizontally from the mother plant. These runners develop small plantlets that eventually produce their own roots. Once the plantlets are rooted, they can be separated and replanted elsewhere in the tank. This method allows the plant to spread naturally, and regular trimming helps manage its growth and prevent overcrowding.

Difficulty

Echinodorus angustifolius is an easy-to-grow plant suitable for beginners and experienced aquarists alike. It adapts well to a range of water conditions and requires minimal maintenance. The plant is generally undemanding but may show signs of iron deficiency if leaves start to yellow, so occasional fertilization with iron supplements can help keep it healthy.

Short Description

Echinodorus angustifolius, known as the Narrow-Leaf Sword, is a graceful plant with long, slender leaves that add texture and height to any aquarium. Its ability to grow both submerged and emersed makes it versatile, allowing aquarists to use it in aquariums, paludariums, and along pond edges. The plant propagates easily through runners, which makes it ideal for creating a dense, natural aquascape over time. Its hardy nature and adaptability make it a popular choice, while its minimal needs and easy propagation ensure it thrives with little effort.