Oyster
Pearl oyster
Pleurotus ostreatus
Never eat a wild-foraged mushroom you identified from a website, this one included. Wild mushroom misidentification can be fatal, and no page can rule a specimen IN. This reference is about cultivated and shop-bought mushrooms only: species you buy, or grow from bought spawn, where there is nothing to identify. To identify anything wild, consult a qualified local expert holding the actual specimen, never a description on a screen.
Also sold as
- Grey oyster
- Tree oyster
- Hiratake
In the kitchen
Flavour
Mild, faintly anise or seafood-like, taking on whatever it is cooked with.
Texture
Tender with a slight bite; holds a lot of water, so it wants a hot dry pan or it steams grey.
In the kitchen
The workhorse gourmet mushroom. Tear along the grain rather than slice, sear hard with space in the pan, and cut away the tough stem bases. Good fried, roasted, or shredded and crisped as a pulled filling.
How it is cultivated
Substrate
Pasteurised straw, hardwood sawdust, spent coffee grounds or cardboard. The least fussy substrate of any cultivated mushroom, which is why it is the beginner's crop.
Fruiting temperature
10-21°C (50-70°F) depending on strain
Humidity
85-95% relative humidity
How it is grown
Pasteurised straw, or a ready-to-fruit kit
Time to first harvest
About 2 to 4 weeks from spawning to the first flush
How much, how long
Several flushes; the first is the largest
Difficulty at home
Beginner. The one thing that fails is humidity: a drying block aborts its pins. Everything else is forgiving.
What is worth knowing about it
The most forgiving mushroom to grow and among the most widely cultivated, which is exactly why it is a good first crop: you raise a known species from bought spawn and never have to identify anything. It fruits fast and heavily on almost any clean pasteurised waste.
Elsewhere on the site
Sources
- Wikipedia, Pleurotus ostreatus
- North Spore and GroCycle grower guides (fruiting range and humidity)
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