Adiantum tomentosum

A lowland Amazonian maidenhair named for the dense brown hairs on its dark stalks. It grows on the floor of terra-firme and gallery forest, and sometimes in seasonally flooded forest. Grow it hot, shaded and humid all year.

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

Specimen labels describe it as a shade-loving terrestrial herb, 0.5–1.4 m tall, in terra-firme rain forest, gallery forest and open rain forest, including selectively logged forest. One record is from igapó on sandy soil, noted as amphibious.

Records run from sea level to about 2,000 m, but the median is 200 m and most are below 300 m.

BoliviaBrazil NorthBrazil West-CentralColombiaEcuadorFrench GuianaGuyanaPeruSurinameVenezuela

🔒 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.