Adiantum isthmicum

A lowland rain-forest maidenhair described by Zimmer in 1989 from Panama. It is also recorded in Costa Rica and north-western Ecuador. It grows in forest on slopes and along rivers below about 350 m, and wants constant warmth, shade and humidity.

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

No rest periodGrows in the ground

Where it grows wild

Labels place it in lowland forest on mid and upper slopes, along rivers and riverbeds, and in disturbed or secondary rain forest near villages.

Recorded at 100–325 m, median 285 m (3 records). Other labels go down to 65 m.

Panama: Colón and DariénCosta RicaEcuador: Esmeraldas

🔒 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.