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Blyxa japonica
IntermediateBlyxa japonica
Beautiful rosette plant native to Japan. Thin leaves spread radially, adding movement to midground layouts. Takes on reddish hue with CO2 — very attractive.
About
Blyxa japonica is a rosette-forming aquatic plant in the family Hydrocharitaceae, found in rice paddies and irrigation channels across East and Southeast Asia, including Japan. Its fine, densely packed leaves radiate outward, and mature clumps take on attractive brown-to-reddish tones. Planted in groups in the mid to background, it forms bushy, mound-like accents. It grows beautifully under bright lighting with CO2 injection, and substrate fertilizer is also effective. Lower leaves tend to melt when nutrients are deficient, so regular fertilization and good water quality are important. It propagates via side shoots that can be divided. Its soft form is popular in nature aquariums, though stable cultivation requires some care, making it suited to intermediate hobbyists. It prefers soft, slightly acidic to neutral water.
Size of the Blyxa japonica
The Blyxa japonica grows to 5-15cm.
Temperature & humidity for the Blyxa japonica
The ideal temperature for the Blyxa japonica is 22〜28℃.
Basic Info
Origin
East and Southeast Asia (including Japan)
Size
5-15cm
Temperature
22〜28℃
Watering & Fertilizer
CO2 recommended + root tabs + liquid fert
Growing Tips
Lighting
Grows beautifully under bright lighting, and under strong light the plant takes on a brown to reddish tint. In weak light the colour fails to develop and the plant becomes loose.
CO2 & Fertilizer
CO2 injection is recommended, combined with both substrate and liquid fertiliser. Lower leaves melt easily when nutrients are short, so fertilise regularly.
Water Temperature & Quality
Prefers a water temperature of 22-28°C and slightly acidic to neutral soft water. Maintaining good water quality is the key to stable growth.
Substrate
Nutrient-rich soil is best. Absorbs mainly from roots
Trimming & Propagation
It produces side shoots and can be propagated by dividing the clump. Planted in a group in the midground to background it forms a bush-like scene.
Notes
Plant firmly as it uproots easily. Spreads via runners
Blyxa japonica FAQ
QWhat is the growing difficulty level for Blyxa japonica?
Intermediate. A variety suitable for intermediate growers. Requires some cultivation experience and knowledge of environment management. Pay careful attention to temperature and humidity control.
QWhat is the ideal temperature for Blyxa japonica?
The ideal temperature for Blyxa japonica is 22〜28℃. Avoid sudden temperature changes and maintain a stable environment.
QHow large does Blyxa japonica get?
The mature size of Blyxa japonica is 5-15cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Blyxa japonica?
Blyxa japonica: watering & fertilizer — CO2 recommended + root tabs + liquid fert. Aim for appropriate frequency and amount.
QWhat is the typical price for Blyxa japonica?
The price of Blyxa japonica varies significantly by variety, characteristics, size, and lineage. Please check GrowerDirect's price guide for the latest market information.
Last updated: June 24, 2026
References & Sources
Edited & verified by: GrowerDirect Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Regulations & Conservation Status
Sources: Ministry of the Environment Designated Invasive Species List (Invasive Species Act) / CITES Appendix II listed plant taxa (family and genus level)
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
Find listings for this species
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