Blechnum ryanii

A montane fern of the Lesser Antilles cloud forests, including Guadeloupe, Martinique and Dominica, with outlying records from Jamaica and Colombia. Grow it cool to intermediate in very humid shade.

At home, aim for

Day IntermediateTargets 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

Inferred from records: a fern of wet montane and cloud forest on the volcanic islands, in shaded, humid understory and along banks.

Recorded at 500–3,470 m (median 1,100 m); the highest records are from Colombia.

GuadeloupeMartiniqueDominicaSaint VincentSaint Kitts and NevisMontserratJamaicaColombia

🔒 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.