Psilocybe guilartensis

A small blue-staining psilocybin mushroom of section Brunneocystidiatae from Puerto Rico and the Dominican Republic, with dark violet-brown caps 1–3 cm across. It grows in groups on disturbed bare clay or moss along trails, in coffee plantations and on landslides. It contains psilocybin, a controlled substance in many countries; check local law before cultivating.

At home, aim for

Day Warm-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light Dappled lightDLI and PPFD in Plantistry

No rest period

Where it grows wild

Gregarious on disturbed bare clay or moss on trails, coffee plantations and landslide scars in tropical and subtropical forest.

Recorded at 475–900 m (4 records), in the Cordillera Central foothills.

Puerto RicoDominican Republic

🔒 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. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.