Arum cylindraceum

A tuberous Arum of European deciduous woods and scrub, close to Arum maculatum but with unspotted leaves and a cylindrical tuber. It leafs up in autumn or early spring, flowers in spring and dies back in summer, so it is grown cold-hardy outdoors with a dry-ish summer dormancy.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Grows in deciduous woodland, woodland edges, hedges and scrub on humus-rich, often calcareous soils, getting light before the canopy closes.

Recorded at 15–2,030 m (median 475 m, 161 records); higher in the southern mountains.

DenmarkSwedenGermanyPolandCzechiaSlovakiaAustriaSwitzerlandHungaryRomaniaBulgariaBalkan PeninsulaItalySpainPortugalGreece

🔒 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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More Arum

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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.