Polypodium incognitum

A recently recognised, hard-to-tell-apart member of the eastern North American rock polypody group, recorded from Ontario, New York and Ohio. Like its relatives it is a small evergreen fern of mossy rock in cool temperate forest, and it needs a real cold winter rather than year-round warmth.

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 like the related rock polypodies: on mossy boulders, ledges and cliff faces in mixed and hardwood forest, rooted in thin humus over rock. Specific habitat notes for this segregate are thin, so this follows the genus group.

Recorded sites sit at roughly 60–380 m in the lowlands of southern Ontario and nearby states; few records carry an elevation.

OntarioNew YorkOhio

🔒 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.