Calvatia owyheensis

A puffball described by A. H. Smith in 1964 and known from only a handful of records in south-western Idaho, around the Owyhee country. Almost nothing is published about it beyond the original description, and it is not cultivated.

At home, aim for

Day Cool-growingTargets in Plantistry

Night A clear drop at nightTargets in Plantistry

Humidity Ordinary room humidityBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

The records come from the dry Snake River Plain and Owyhee uplands, a sagebrush-steppe landscape. Like most Calvatia it is presumed to fruit on soil as a saprotroph; the exact microhabitat is not documented.

No record carries an elevation; the weighted measured site sits at about 770 m, with one mountain site near 2300 m.

Idaho

🔒 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.