Blechnum spicant

Deer fern or hard fern, a hardy evergreen fern of cool, wet acid woodland in Europe and western North America. It wants shade, constantly moist acidic soil, cool temperatures and a cold winter, and does poorly in warm, dry rooms.

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 in the ground

Where it grows wild

Grows in moist, acidic conifer and broadleaf woodland, on shady banks, in ravines and on moorland edges, usually in humus-rich or peaty soil.

From near sea level to subalpine elevations; no measured elevations were available.

EuropeMacaronesiaNorth AfricaWestern North AmericaJapan

🔒 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.