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Species library › Adiantum › Adiantum alarconianum
Ferns Little published: much of this is inferred from related species

Adiantum alarconianum

A maidenhair fern from the lowlands and foothills of western Ecuador and neighbouring Tumbes in Peru, first collected near Guayaquil. Its fronds are 30–50 cm long, with alternate, oblong-falcate pinnae and iridescent scales on the stipe. It grows in wooded areas of a strongly seasonal region, and suits a warm, shaded, humid terrarium or bright bathroom.

At home, aim for
Day Warm-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Ordinary room humidityBand in Plantistry
Light ShadeDLI and PPFD in Plantistry
Expects a seasonal restGrows in the ground

Where it grows wild

A terrestrial fern of wooded areas. Much of its lowland range around Guayaquil and Tumbes is seasonally dry forest, where maidenhairs usually grow on shaded banks, ravines and stream edges that stay moist. The sources consulted do not describe its microhabitat in detail.

Wild records run from about 20 to 800 m, with a median of about 340 m, which places it in the coastal lowlands and the western Andean foothills.

Ecuador: western lowlands and foothills (Guayas, Los Ríos, El Oro, Manabí and nearby provinces)Ecuador: GalápagosPeru: TumbesColombia (listed by Kew)

🔒 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.