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Eriocaulon sp. "Japan Needle Leaf"

Eriocaulon sp. "Japan Needle Leaf"

Eriocaulon sp. 'Japan Needle Leaf': elegant rosette plant for the midground. Its needle-like leaves are ideal for high-impact focal points.

Taxonomy
Class:Liliopsida
Order:Poales
Family:Eriocaulaceae
Genus:Eriocaulon
Species:Eriocaulon sp. "Japan Needle Leaf"

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Water Temperature

21 - 26 °C

pH Value

5 - 7

Water type

Freshwater

Light

Medium - High

CO2

High

Expected height

40 cm

Expected width

20 cm

GH

0 - 10 dGH

KH

0 - 12 dKH

Species description

This selection comes from humid and aquatic environments in Japan. It grows in cool, clear, flowing waters, often on sandy substrates rich in organic matter along the margins of small rivers and mountain springs. It belongs to the Eriocaulaceae family, genus Eriocaulon. Species of this genus are famous for their specific requirements and geometric shape. The 'Japan Needle Leaf' variety is prized for its exceptionally narrow leaf shape.

Care, breeding and tankmates

Requires very soft (low KH, preferably 0-4) and acidic water (pH 5.0-7.0). The optimal temperature must be cool and stable, between 21 and 26 °C. It is highly sensitive to sudden changes in chemical parameters and organic buildup on the substrate. Root rot is the main risk in compacted substrates.

Geographic Origin and Distribution

This species originates from: Giappone.

Origin

East Asia

Plant profile

Placement
Midground

It is best placed in the midground to background. Its tall, grassy appearance makes it a great transition plant to bridge the gap between low foregrounds and tall stem plants.

Botanical form
Rosette

This is a grassy plant with very long, fine, needle-like leaves that sway gracefully in the water current. It forms tall tufts rather than a low, compact rosette.

Growth
Medium

It has a moderate growth rate. It is slower than typical background stem plants but grows faster and taller than the smaller Eriocaulon rosettes.

Substrate
High

Eriocaulon sp. "Japan Needle Leaf" is a sensitive root-feeder that absolutely thrives when planted in a rich, active aqua soil. Its extensive root network requires a deep, loose, and nutrient-dense bed to properly anchor and draw in essential elements. A substrate depth of at least 5-7 cm is necessary to accommodate the long roots and prevent the plant from uprooting. Providing a consistent supply of nutrients at the root zone, often supplemented by root tabs in older setups, will ensure its delicate, needle-like leaves remain vibrant and healthy.

Column fertilization
Recommended

It benefits immensely from regular liquid fertilization, especially trace elements and iron. High CO2 injection and pristine water conditions are essential to prevent stunting.

Root fertilization
Recommended

It is strongly root-feeding. A deep, rich aquasoil bed is required, and root tabs should be used to replenish the substrate as the setup ages.

Trimming
Occasional

Avoid cutting the leaves across the middle as they will not regrow properly and will look unnatural. Instead, pull out older, damaged, or algae-covered leaves directly from the base.

Propagation
Cuttings

Propagation is done by splitting the crown at the base once the plant has formed a substantial clump. Carefully pull apart the sections to ensure each has roots.

Sensitivity
Moderate

It is highly sensitive to hard water and fluctuating parameters. It may melt if the substrate becomes anaerobic, or if it is subjected to shading by other plants.

Layout role
Midground, Background

It provides a beautiful grassy texture in the midground or background. It contrasts beautifully with broad-leaved plants, hardscape, or dense carpeting plants.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

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Last updated: 06/16/2026