Adiantum janzenianum

A natural hybrid maidenhair described from Costa Rica in 2013 and known from only three wild records, near sea level. Its climate is strongly seasonal: a hot, very dry season from December to April, then heavy rains. Nothing on its ecology beyond the description is available, so treat this profile as an estimate.

At home, aim for

Day Warm-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Presumably terrestrial on the shaded floor of lowland forest, like its likely parents. The measured climate points to forest with a marked dry season rather than ever-wet rainforest.

Recorded at 10–1,000 m, median 10 m (3 records).

Costa Rica

🔒 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.