Asplenium akaishiense

A natural hybrid spleenwort described by Otsuka in 1977 from the Akaishi Mountains of central Honshu, Japan, and also listed for north-central China. The Japanese records lie in the mountains of Yamanashi, Nagano and western Tokyo, with cold winters and hot, wet summers. As a hybrid it is probably sterile, so propagate by division.

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 on rock (lithophyte)

Where it grows wild

Mountain forest in central Honshu. Its exact microhabitat is not documented in sources reachable here; hybrid spleenworts in this region are usually found on shaded rocks and rocky slopes where their parents grow together.

Records carry no elevation; the sites lie in the montane zone of the Akaishi and Chichibu–Okutama mountains.

China North-CentralJapan

🔒 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.