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Species library › Asplenium › Asplenium adulterinum
Ferns Well documented

Asplenium adulterinum

A small tufted rock fern that grows almost only on serpentine (ultramafic) rock, from Norway and central Europe to British Columbia and Alaska. It looks like maidenhair spleenwort, but the top of the rachis stays green. Swiss floras place it in half-shade on moderately moist, nutrient-poor serpentine from the lowlands to the subalpine zone.

Asplenium adulterinum
Photo: Václav Lupínek, CC BY-SA 3.0 cz, via Wikimedia Commons
At home, aim for
Day Cool-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Ordinary room humidityBand in Plantistry
Light Bright, filtered lightDLI and PPFD in Plantistry
Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Crevices and ledges of serpentine cliffs and boulders, from lowland to subalpine elevations. Swiss indicator values rate it as half-shade, moderately moist, nutrient-poor, weakly acid to neutral (pH 4.5–7.5), and suboceanic.

Recorded from 5 to 2400 m, median 750 m (121 records); lowland in Norway, colline to subalpine in the Alps.

AlaskaAustriaBritish ColumbiaCzechia-SlovakiaFinlandGermanyItalyNW. Balkan Pen.NorwayPolandRomaniaSwedenSwitzerland

🔒 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 cz licence, unmodified.