Polypodium calirhiza

A polypody fern of California and southern Oregon, with a few populations in the Mexican highlands, that grows on shaded rocks, banks and mossy tree bases. It is winter-green and summer-dormant: it grows in the cool, wet season and dies back when summer drought arrives.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Grows in shaded rock crevices, mossy outcrops, stream banks and tree bases in oak woodland, coastal scrub and mixed forest. It is thought to have arisen from a cross between P. glycyrrhiza and P. californicum.

Recorded at 3–3,109 m, median 335 m; most Californian records are low, and the high records are likely from Mexico.

CaliforniaOregonMexico CentralMexico GulfMexico Southwest

🔒 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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More Polypodium

Polypodium vulgare Polypodium glycyrrhiza Polypodium appalachianum Polypodium cambricum Polypodium virginianum Polypodium interjectum Polypodium amorphum Polypodium californicum Polypodium hesperium Polypodium scouleri Polypodium abitaguae Polypodium chionolepis All 60 →

Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.