Blechnum niponicum

A Japanese temperate forest fern (also placed in Struthiopteris or Spicantopsis) with dimorphic fronds: spreading sterile fronds and upright fertile ones. It is a shade plant of moist, cool forest slopes that needs a cold winter.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Terrestrial on moist, shaded slopes and banks in temperate deciduous and mixed forest, often on acidic, humus-rich soils.

Recorded from 5 to 1615 m, median 500 m.

HokkaidoHonshuShikokuKyushuYakushimaKuril IslandsTokara Islands

🔒 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.