Maitake (Grifola frondosa)

Spawn run:
Incubation temperature: 70-75ºF (21-24ºC)
Relative humidity: 95-100%
Duration: 14-30 days, then dormant for 30 days
CO₂: 20,000-40,000 ppm
Fresh air exchanges:0-1 per hour
Light requirements: n/a

Primordia formation:
Initiation temperature: 50-60ºF (10-16ºC)
Relative humidity: 95% 
Duration: 5-14 days
CO₂: 2,000-5,000 ppm
Fresh air exchanges: 4-8 per hour
Light requirements:  100-500 lux

Fruitbody development:
Air temperature: 50-60ºF (13-18ºC)
Relative humidity: 75-85%
Duration: 14-21 days
CO₂: < 1,000 ppm
Fresh air exchanges: 4-8 per hour
Light requirements: 500-1,000 lux

Cropping cycle:
Every 3-4 weeks for a maximum of two flushes.