Utricularia japonica

A free-floating aquatic bladderwort of ponds, marshes and ditches in Japan, Korea and the Russian Far East, treated by GBIF as a hybrid (Utricularia × japonica) and by Wikipedia as part of U. australis. It is temperate, forming winter buds (turions), and largely sterile, so it spreads by fragments. Grow it outdoors in a sunny tub of soft water.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restAquatic

Where it grows wild

It floats in still, shallow water of lowland ponds, marshes and paddy ditches.

Lowland: labelled records 1–239 m (median 37 m); Siberian records reach about 460 m.

JapanKoreaRussian Far EastSiberiaMongolia

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.