Blyxa japonica
A grassy rosette that throws fountain-like blades and flushes bronze-orange under high light. The signature midground plant of the iwagumi style — pairs with hairgrass and Monte Carlo for the classic Japanese stone scape. Wants soft, slightly acidic water to colour up.
Blyxa Japonica (Blyxa japonica) is a rosette aquatic plant for the midground of a planted tank. It reaches 10–25 cm under good conditions and grows at a medium rate. Light: medium to high. CO₂: recommended. Target 20–28 °C, pH 5.5–7.0, and 1–10 dGH. Substrate: Aquasoil preferred, root tabs in inert substrate. Propagate via side shoots from the rosette base.
Care at a glance
A grassy rosette that throws fountain-like blades and flushes bronze-orange under high light. The signature midground plant of the iwagumi style — pairs with hairgrass and Monte Carlo for the classic Japanese stone scape. Wants soft, slightly acidic water to colour up.
By Mike ElmiraUpdated 1 min read
Part of our complete guide to the planted aquarium.
The parameters that decide whether blyxa japonica fits in your tank.
Hydrocharitaceae
Rosette
Midground
Aquasoil preferred, root tabs in inert substrate
Side shoots from the rosette base
East and Southeast Asia
East and Southeast Asia
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Direct answers to the questions search engines and AI assistants surface most often about this species.
CO₂ requirement: recommended. Light requirement: medium to high. Under low-tech conditions the plant grows at a medium rate.
Blyxa Japonica (Blyxa japonica) needs medium to high light. Run a photoperiod of 6–8 hours; longer photoperiods invite algae unless CO₂ and dosing are dialled in.
Position: midground. Substrate: Aquasoil preferred, root tabs in inert substrate It typically reaches 10–25 cm.
Propagation method: Side shoots from the rosette base. Blyxa Japonica is a rosette plant.
Target 20–28 °C, pH 5.5–7.0, and 1–10 dGH. Flow tolerance: low to medium.
Difficulty: 3/5. Intermediate, stable parameters and a mature tank matter.
A planted tank is a system. Pair this plant with one entry from each other pillar to plan the whole scape.
