Cypripedium japonicum

A temperate lady's-slipper orchid of Japan, Korea and central and eastern China, with a pair of fan-shaped leaves and a large pink-flushed pouch. It needs a genuinely cold winter dormancy and a humid, shaded, rainy summer; it is endangered in the wild.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Assumed from the measured sites and the genus: shaded woodland floor, forest edges and bamboo groves, rooting in moist humus that never waterlogs.

Records run from near sea level to 1,400 m (median about 1,000 m); the weighted climate leans on lowland Japanese sites.

JapanKoreaChina North-CentralChina South-CentralChina Southeast

🔒 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. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.