Calvatia cretacea

Calvatia cretacea is a chalk-white arctic-alpine puffball, first described by Berkeley and moved to Calvatia by Lloyd in 1917. It has 435 wild GBIF records across Scandinavia, Iceland, Svalbard, Greenland, northern North America and the Alps, from sea level to about 3900 m. It fruits in the short, cool summer on open tundra and alpine ground and is not cultivated.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

Open tundra, fell-fields and alpine grassland on mineral soil among mosses and low plants, inferred from the range and its many high-latitude records.

Recorded from sea level to about 3900 m, median about 780 m; lower in the Arctic, higher in the Alps and the Rockies.

Arctic (Svalbard, Greenland, Iceland)ScandinaviaNorthern North AmericaEuropean AlpsRocky Mountains

🔒 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.