Psilocybe Cubensis Growth Parameters

Nan's Nook : Archives : Misc Tek & Questions : FAQ : Mushroom Documents & Papers : Psilocybe Cubensis Growth Parameters
  Subtopic Posts Updated Creator
Shroom Glossary  -    
Pure Culture  -    
Simple Cubie Tek  -    

By Nan (Nanook) on Monday, October 22, 2001 - 12:19 am:

Psilocybe Cubensis Growth Parameters

taken without permission from

Paul Stamets and J.S.Chilton: The Mushroom Cultivator

If you want more information (and there is plenty!), go buy the book ::

Mycelial Types: Rhizomorphic to linear; whitish in overall color but often bruising bluish where injured.

Standard Spawn Medium: Rye grain. See Chapter III.

Fruiting Substrate: Rye grain; wheat straw; leached horse or cow manure; and/or horse manure/straw compost balanced to a 71-74% moisture content.

Method of Preparation: See Chapters III, V, and VI. Pasteurization achieved through exposure to live steam for 2 hours at 140°F. throughout the substrate. Straw or Compost should be filled to a depth of 6-12 inches. Straw should be Spawned at a rate of 2 cups/sq. ft.

Spawn Run:

Relative Humidity: 90%.

Substrate Temperature: 84-86 °F. Thermal death limits have been established at 106°F.

Duration: 10-14 days.

CO2: 5000-10,000 ppm.

Fresh Air Exchanges: 0 per hour.

Type of Casing: After fully run, cover with the standard casing whose preparation is described in Chapter VIII. Layer to a depth of 1-2 inches. The casing should be balanced to an initial pH of 6.8-7.2.

Post Casing/Prepinning:

Relative Humidify: 90 + %. Substrate Temperature: 84-86°F.

Duration of Case Run: 5-10 days.

CO2: 5000-10,000 ppm.

Fresh Air Exchanges: 0 per hour.

Light: Incubation in total darkness.

Primordia Formation:

Relative Humidify: 95-100%.

Air Temperature: 74-78 °F.

Duration: 6-10 days.
CO2: less than 5000 ppm.
Fresh Air Exchanges: 1 -3 per hour.

Light: Diffuse natural or exposure for 12-16 hours/day of grow-lux type fluorescent light high in blue spectra at the 480 nanometer wavelength. (See Chapters IV and IX).


Relative Humidify: 85-92% [Cased Beds]

Air Temperature: 74-78 °F.

CO2 : less than 5000 ppm.

Fresh Air Exchanges: 1 -3 per hour.

Flushing Pattern: Every 5-8 days.

Harvest Stage: When the cap becomes convex and soon after the partial veil ruptures.

Light: Indirect natural or same as above.

Yield Potential: Average yields are 2-4 Ibs./sq.ft. over a 5 week cropping period. Maximum yield potential has not been established.

Moisture Content of Mushrooms: 92% water; 8% dry matter.

Nutritional Content: Not yet established.

See: Longevity