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Species library › Utricularia › Utricularia macrorhiza
Carnivorous Well documented

Utricularia macrorhiza

common bladderwort

A large, free-floating aquatic bladderwort of ponds, lakes and slow rivers across North America and temperate eastern Asia. Its finely divided stems carry bladder traps that snap shut in about two thousandths of a second, and it raises spikes of 6–20 yellow flowers from June to August. It overwinters as dormant buds (turions), so it needs full sun in summer and a cold winter rest.

At home, aim for
Day IntermediateTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity —Band in Plantistry
Light Full sunDLI and PPFD in Plantistry
Expects a seasonal restAquatic

Where it grows wild

Floats just below the surface in still or slow water: ponds, lakes, marsh pools, ditches and slow-moving streams and rivers, usually among other aquatic plants and in full sun.

It occurs from near sea level to mountain ponds and lakes. Few GBIF records carry an elevation, so this was not measured.

CanadaUnited States (Alaska and much of the lower 48 states)Northern and central MexicoSiberiaRussian Far EastNorthern and western China

🔒 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.