SinoFungus

Frequently Asked Questions

• What is the ideal fruiting temperature for oyster mushrooms, and how do I use temperature swings to trigger pinning?
  Oyster mushrooms fruit best between 5–20°C (41–68°F). A diurnal temperature swing of ~10°C between day and night is the most effective natural trigger for pinning. In warm climates, ventilate at night to create this differential.
• My substrate bag is contaminated — can it be saved?
  It depends on the stage and extent. Early-stage green mold confined to one end can sometimes be isolated by cutting away the affected section and resealing. If contamination exceeds 30% of the block, disposal is safer to prevent spreading spores.
• Why are my oyster mushrooms growing long stems with tiny caps?
  This is a classic CO₂ stress response indicating insufficient fresh air exchange. Increase ventilation frequency and target CO₂ levels below 1000 ppm during fruiting. Also ensure indirect light levels of 500–1000 lux.
• How many generations can I use the same spawn before re-isolating?
  Limit working cultures to 3–5 transfers from the master culture. Conduct annual spore or tissue isolation to refresh genetic stock and identify high-performing strains.
• How should I store oyster mushrooms after harvest to maximize shelf life?
  Store immediately at 2–4°C in breathable packaging. Avoid sealed plastic bags. Shelf life at proper cold storage is 5–7 days. For longer storage, blanch and freeze within 24 hours of harvest.