Asplenium jahandiezii

A small spleenwort endemic to the limestone gorges of Provence in south-east France, classically the Gorges du Verdon. It lives in shaded crevices and under overhangs of limestone cliffs at about 550–930 m, where winters are cold and summers hot and dry. Grow it as an alpine-house crevice plant: cool, bright shade, sharp drainage and lime.

At home, aim for

Day Cool-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 on rock (lithophyte)

Where it grows wild

It grows in crevices and under overhangs of shaded limestone cliffs in the gorges. The rock shelters it from full sun and keeps the roots cool.

Recorded at 554–933 m, median 643 m (15 records).

France

🔒 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 CC BY-SA 3.0 licence, unmodified.