Coprinus colosseus

A very large shaggy-mane-type inkcap described by Frank Bogart in 1976 in his treatment of Coprinus in Washington and adjacent western states. It is a close relative of Coprinus comatus in Coprinus in the strict sense, and GBIF records come from the Pacific Northwest, northern California and northern Arizona. Little else is published, so cultivation guidance follows C. comatus.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light Bright, filtered lightDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

On soil, especially disturbed or compacted ground, grassy clearings and roadsides, like the shaggy mane; the specific habitat notes were not available.

Records range from near sea level to about 2,600 m (the Grand Canyon rim and Mount Rainier).

Western United States

🔒 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.