How to Grow Blue Oyster

Pleurotus ostreatus

Fast, forgiving, and dramatic — the classic first mushroom.

Ideal growing conditions

Temperature: 60–66°F (16–19°C)
Humidity: 86–92%
Fresh air (FAE): High — very CO₂-sensitive
Light: Bright indirect

Timeline

Pins 3–5 days · harvest 7–10 days.

When to harvest

While cap edges still curl under, before they flatten.

Substrate

Straw, hardwood sawdust, or masters mix.

Flavor & cooking

Mild, savory, velvety when cooked.

Grower notes

Cool-loving strain. The best place to start. Very fresh-air-hungry — high FAE keeps stems short and caps thick.

Our dialed-in targets

Our zone — pin 62°F · 94% · 500 ppm CO₂ · fruit 63–65°F · 88–90% · 600–800 ppm · 1,200–1,500 lux

MycoIQ tunes targets like these to your room as you log grows — so they get sharper every harvest.

Frequently asked questions

What temperature does Blue Oyster need?

Blue Oyster fruits best at 60–66°F (16–19°C), with relative humidity around 86–92% and high — very co₂-sensitive fresh-air exchange.

How long does Blue Oyster take to grow?

Pins 3–5 days · harvest 7–10 days. MycoIQ tracks each block and forecasts your harvest window as it goes.

When should I harvest Blue Oyster?

While cap edges still curl under, before they flatten.

Is Blue Oyster good for beginners?

Blue Oyster is rated beginner to grow. Cool-loving strain. The best place to start. Very fresh-air-hungry — high FAE keeps stems short and caps thick.

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