Adiantum concinnum

Brittle maidenhair fern

A neotropical maidenhair from northern Mexico to eastern Brazil, with arching, finely divided fronds of small fan-shaped pinnae on dark, wiry stalks. It is a lowland species, recorded below about 1,500 m, and is more sensitive to cold than most maidenhairs. Give it warmth, steady moisture and humid, shaded conditions.

Adiantum concinnum — Photo: Lowe, E. J., Public domain, via Wikimedia Commons

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

No rest periodGrows in the ground

Where it grows wild

A clump-forming fern with an erect to semi-erect rhizome, growing in humid tropical places with moist soil. Like many American maidenhairs, it is typically found on shaded banks, slopes, rocks and walls, and along streams, where its arching fronds can hang down. No detailed habitat description specific to this species was found.

Recorded at altitudes below about 1,500 m, so it is a lowland to submontane species.

Mexico (from the north southwards)Central AmericaTropical South America to eastern Brazil

🔒 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. Photo from Wikimedia Commons, used under its Public domain licence, unmodified.