Biarum mendax

An Iberian Biarum, common in the Alentejo of southern Portugal and also found in southern Spain. It is an autumn-flowering tuber that grows through the mild, wet winter and bakes dry through a hot summer. Treat it as a Mediterranean bulb for a frost-free greenhouse.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows in the ground

Where it grows wild

Grows across lowland plains and hills in the Alentejo and in Andalucía and Extremadura. By analogy with the genus it uses open ground in grassland, open scrub, cork-oak pasture margins and stony places.

Most records are lowland (climate sites 10–250 m). The three records that carry an elevation are 800–1300 m, probably from Andalucían mountains.

PortugalSpain

🔒 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.