Pyrrosia petiolosa

A small, tough felt fern of rock faces and tree trunks across temperate China and Korea. Its thick fronds have dense hairs underneath and roll up when dry. It wants a cold, drier winter and a warm, wet summer, and it tolerates far more drought than most ferns.

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 on rock (lithophyte)

Where it grows wild

It creeps over dry to moist rock faces, cliffs and old walls, and sometimes over tree bark, in hilly forest and open scrub. The rolled, hairy fronds let it survive dry spells.

Records with an elevation run from 160 to 1,660 m (median 720 m), but only a handful carry one.

ChinaKoreaRussian Far EastMongolia

🔒 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.