Question 1

What temperature do oyster mushrooms fruit at?

Accepted Answer

Most blue and pearl oyster (Pleurotus ostreatus) fruit best at roughly 10–21°C (50–70°F). Warm-loving pink and golden oysters prefer 18–30°C (64–86°F). All oysters want 85–95% humidity and plenty of fresh air.

Question 2

What are the ideal fruiting conditions for lion's mane?

Accepted Answer

Lion's mane (Hericium erinaceus) fruits at about 18–24°C (64–75°F) with 90–95% humidity, low CO₂ (under ~800 ppm), and high fresh-air exchange. Too much CO₂ produces branchy 'coral' growth with no spines.

Question 3

What humidity do mushrooms need to fruit?

Accepted Answer

Most gourmet mushrooms fruit at 85–95% relative humidity. Lion's mane and nameko prefer the high end (90–95%), while shiitake tolerates a bit drier (80–90%). Pins abort if humidity drops too low.

Question 4

What is FAE in mushroom growing?

Accepted Answer

FAE stands for fresh-air exchange — replacing CO₂-rich air with fresh air during fruiting. Most gourmet species need high FAE; too little fresh air causes long stems, small caps, and aborted pins. Reishi and the cultivated long-stem enoki form are exceptions that use high CO₂ deliberately.

Mushroom fruiting conditions, by species

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