Adiantum vivesii

A maidenhair fern known from one colony in a shaded limestone hollow near Quebradillas in north-western Puerto Rico. It was listed as endangered in 1993, but studies showed the colony is one sterile hybrid plant spreading by rhizome. It was delisted in 2022 as not a true species. It can only be propagated by rhizome division, and conditions are best copied from a deeply shaded, humid, limestone forest floor.

At home, aim for

Day Warm-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Humid airBand in Plantistry

Light Deep shadeDLI and PPFD in Plantistry

No rest periodGrows in the ground

Where it grows wild

Grows in a deeply shaded hollow at the base of a limestone hill (mogote) in the northern karst, in semi-evergreen seasonal forest. The soils are shallow, well-drained and alkaline between limestone outcrops. The colony covers about 21 × 10 m.

Specimens are labelled 225–250 m.

Puerto Rico (Quebradillas)

🔒 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.