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Echinodorus bleherae (E. bleheri)
Echinodorus bleherae (E. bleheri)
Echinodorus bleherae is the iconic Amazon Sword, a colossal and incredibly robust centerpiece plant boasting massive, leathery bright-green lanceolate leaves.
Water Temperature
15 - 30 °C
pH Value
6 - 7.5
Water type
Freshwater
Light
Low
CO2
Medium - High
Expected height
50 cm
Expected width
30 cm
KH
2 - 10 dKH
Species description
Geographical Origin and Habitat: Echinodorus bleherae (commonly known as the Amazon Sword plant) is native to the tropical regions of South America, particularly within the Amazon River basin. In the wild, it colonizes riverbanks, slow-flowing channels, and temporary marshes. During the rainy season, it lives completely submerged, while in the dry season it grows in emersed form on damp, muddy soils, where it flowers, producing long stalks with white blossoms.
Taxonomy & Genetics: It belongs to the Alismataceae family, genus Echinodorus. The taxonomy of this species has undergone revision; it is closely related to and sometimes confused with Echinodorus amazonicus. Genetically, it is an extremely robust and adaptable plant with a stable genotype that allows it to tolerate wide variations in water parameters, making it one of the most popular and cultivated aquarium plants worldwide.
Physical Structure: It exhibits a massive and vigorous herbaceous rosette growth habit, which can exceed 40-50 cm in height and 30 cm in width in the aquarium. The leaves are large, lanceolate or spatulate, supported by long, fleshy petioles arising from a short, woody rhizome. It possesses an exceptionally developed root system, with strong, thick roots that penetrate deeply into the substrate, ensuring perfect anchorage and nutrient absorption.
Color & Texture: The leaves display a uniform bright green color, ranging from apple green in younger leaves to forest green in mature ones. The leaf blade has a smooth, leathery texture with 3-5 prominent light longitudinal veins running parallel along the leaf, giving it a sturdy, three-dimensional structure.
Care, breeding and tankmates
Lighting & CO2: Tolerant of lighting conditions, it grows well under low to moderate light. Under medium-high light, growth accelerates significantly and the leaves become denser. CO2 injection is not essential, but it promotes faster development and thicker leaf texture, keeping the plant in optimal health.
Nutrition & Substrate: It is a very heavy root feeder; it requires a fertile, deep substrate (at least 6-8 cm) to accommodate its massive root system. The periodic insertion of fertilizer tablets rich in iron and macronutrients near the base is essential to prevent leaf yellowing (chlorosis). It also responds well to moderate liquid fertilization.
Water Chemistry: Highly adaptable, it tolerates pH between 6.0 and 8.0 and soft to hard water. The optimal water temperature is between 20°C and 28°C, though it can tolerate wider ranges (15-30°C). Parameter stability encourages continuous growth without dormancy periods.
Space Management & Placement: Due to its large final size, it should be placed in the background or midground of medium to large aquariums. Avoid planting it too close to glass or hardscape to allow the leaves to fan out. It can shade smaller plants placed nearby.
Pruning: Pruning consists of periodically removing older, damaged, or yellowing leaves by cutting them close to the rhizome base with sturdy scissors. This stimulates the rosette to constantly produce new leaves from the center and prevents organic debris accumulation on the substrate.
Risks & Diseases: It is a hardy plant, but iron deficiency quickly manifests as translucent or yellowing leaves. Furthermore, the large, tender leaves can be damaged by herbivorous fish or plant-eating snails. It can suffer from black beard algae on the leaf margins in the presence of nutrient imbalances or poor water flow.
Geographic Origin and Distribution
Echinodorus bleherae (commonly known as the Amazon Sword plant) is native to the tropical regions of South America, particularly within the Amazon River basin. In the wild, it colonizes riverbanks, slow-flowing channels, and temporary marshes. During the rainy season, it lives completely submerged, while in the dry season it grows in emersed form on damp, muddy soils, where it flowers, producing long stalks with white blossoms.
Origin
Amazon, Orinoco, and Guianas
Plant profile
- Placement
- Midground
- Echinodorus bleherae (E. bleheri) is best utilized as a striking midground or background plant, depending on the size of the aquarium. Its bold texture contrasts beautifully with fine-leaved stem plants and low-growing carpeting species. When planted in groups, leave enough distance between individual crowns to accommodate future growth. Ensure adequate space is left around the base to prevent overcrowding and allow for proper water circulation.
- Botanical form
- Rosette
- Botanically, Echinodorus bleherae (E. bleheri) typically exhibits a classic rosette form with leaves radiating from a central crown. The overall architecture of the plant provides excellent hiding spots for shy fish and aquatic invertebrates. Submersed forms often differ significantly from their emersed growth, becoming more delicate and displaying varied colors. Depending on the exact lighting, the leaf margins may display slight undulations or varying degrees of coloration.
- Growth
- Medium
- The growth rate of Echinodorus bleherae (E. bleheri) is generally moderate, but it can be accelerated under optimal conditions. Its growth may temporarily stall after transplanting while it focuses energy on establishing a new root system. Under lower light, the growth will be noticeably slower and the plant will remain more compact. Once fully established, it can send out runners or reliably produce several new leaves every week.
- Substrate
- High
- A nutrient-rich substrate is highly recommended for Echinodorus bleherae (E. bleheri) as it is a heavy root-feeder. The dense root system will quickly spread through the substrate, stabilizing it and absorbing deposited organics. If planted in inert gravel or sand, root tabs must be inserted deep near the base to supply essential minerals. Compacted substrates should be avoided as they can stifle root growth and lead to anaerobic conditions.
- Column fertilization
- Recommended
- While primarily a root feeder, Echinodorus bleherae (E. bleheri) benefits significantly from supplemental water column fertilization. It is important to avoid over-dosing nitrogen in the water column to prevent excessive algae growth on the leaves. Iron and trace elements are particularly easily absorbed directly through the expansive leaf surfaces. Liquid fertilization serves as an excellent complement to a nutrient-rich substrate, promoting peak health.
- Root fertilization
- Required
- Root tabs are absolutely essential if Echinodorus bleherae (E. bleheri) is kept in an inert or depleted substrate. Capsules or tablets should be placed deeply around the root zone every few months to replenish exhausted nutrients. Even when grown in premium aquasoils, supplemental root fertilization may become necessary as the tank matures. Providing heavy root fertilization allows the aquarist to keep the water column leaner, discouraging algae.
- Trimming
- Occasional
- Trimming Echinodorus bleherae is straightforward and involves pruning only the outermost, oldest leaves. Use sharp aquascaping scissors to cut the petiole as close to the crown as possible without damaging the center. Avoid snipping leaves in half, as the remaining portion will simply rot. Consistent pruning maintains a clean appearance and encourages the continuous emergence of new central shoots.
- Propagation
- Division
- Propagation of Echinodorus bleherae (E. bleheri) is most commonly achieved through adventitious plantlets that form on flowering stalks. These newly separated plants should be planted directly into the substrate where they will quickly establish. If grown emersed, the plant may also produce viable seeds that can be germinated in moist soil. Once these daughter plantlets develop their own distinct roots and a few leaves, they can be carefully detached.
- Sensitivity
- Moderate
- Overall, Echinodorus bleherae is quite hardy, but it can be sensitive to sudden, drastic shifts in water parameters. It may experience a period of melting when transitioning from emersed to submersed growth. During this acclimation phase, it is vital to keep water conditions stable and avoid uprooting the plant. It is also susceptible to spot algae if lighting is too intense without adequate CO2.
- Layout role
- Midground, Background
- In an aquascape, Echinodorus bleherae serves as a magnificent structural anchor or centerpiece. Its substantial leaf mass provides a bold texture that breaks up monotonous areas of fine foliage. It is highly valued in various layout styles for its dominant presence. When positioned correctly, it naturally draws the viewer's eye and adds a sense of maturity to the tank.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
Related species
Recommendations grouped by close relatives, companion choices, and similar care.
