Pinguicula macroceras

horned butterwort

A temperate butterwort of the North Pacific rim, from California to Alaska and across to Kamchatka and Japan. It grows on seeps, wet cliffs and serpentine creek banks, often on moss, and has large violet flowers with a horn-like spur. Like other temperate butterworts, it spends the winter as a tight bud (hibernaculum) and needs a cold dormancy.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Wet slopes, seeping cliffs and nutrient-poor serpentine banks along creeks and rivers, in open, sunny or lightly shaded spots, often growing on a layer of moss.

Near sea level to 2,800 m in the records (median 1,100 m, 46 records); the North American literature gives mainly below 1,800 m.

AlaskaAlbertaAleutian Is.British ColumbiaCaliforniaIdahoJapanKamchatkaKoreaKuril Is.MontanaOregonWashington

🔒 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.