Organic King Oyster Mushroom - Pleurotus eryngii - Pure Culture

Organic King Oyster Mushroom - Pleurotus eryngii - Pure Culture

Synonyms: Pleurotys eryngii, King oyster, Boletus of the steppes, Xìng Xào Gu, Eringi, Saesongi Peoseot 

Characteristics of the King oyster mushroom are its delicate aroma and firm flesh. The eryngii is an exquisite edible mushroom that can be used similarly to porcini mushrooms. The fruiting bodies have diameters of 3 - 10 cm, and the stem also reaches lengths of 3 - 10cm. The king oyster mushroom can reach a weight of up to 300g per piece under particularly good conditions.
When refrigerated, freshly harvested fruit bodies can last up to 2 weeks!

Production time is 3 - 6 weeks, as this material is made fresh on demand.​
The material should be processed immediately after delivery.
It can otherwise be stored in the refrigerator at 4 °C for up to 2 weeks.
Please consider these timings when placing the order.
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Suitable cultivation methods: 
Straw bales, wood logs, mushroom patch, spawn bag for indoor greenhouses   

Suitable Substrates: straw, hardwood
Suitable woods: poplar, oak, alder, aspen, maple, birch, ash, beech, willow, elm
Outdoors: this strain produces fruiting bodies late summer to early autumn 

You receive living, actively growing, axenic cell culture, entirely free of other strains or contaminating organisms, for further propagation. Our pure cultures are custom-made and produced freshly after ordering -  in a class 100 clean room environment on a solid nutrient medium (MEA) based on plant-derived raw materials. The pure culture needs around 2-3 weeks until its mature enough for shipping. The culture is supplied in special cell culture flasks (Filling volume: 15 ml culture medium, Growth area: 25 cm², Measurements: L x W x H = 79,7 x 42,6 x 26,53 mm) with breathable, hydrophobic membrane. This special design prevents introduction of contaminants and facilitates optimum gas exchange thanks to the high air flow rate of the membrane. With this packaging, the mushroom culture can withstand longer shipping distances and time without compromising quality or germination ability. 

This product is intended for professional production of grain spawn to further propagate this strain of fungi. Working with pure cell culture requires detailed mushroom cultivation skills. For beginners and hobby growers we recommend starting with grain spawn or sawdust spawn. 

We highly recommend reading this book - gain further detailed knowledge for successful mushroom cultivation:
- Growing Gourmet & Medicinal Mushrooms, Dr. Paul Stamets, ISBN: 978-1580081757 (Englisch)

Taxonomy: 
Class:  Basidiomycetes 
Subclass: Agaricomycetidae 
Order: Agaricales 
Family: Pleurotaceae 
Genus: Pleurotus 
Species: Pleurotus eryngii 
Spores: white-ish, 7 - 9,5 µ x 3,5 µ 

Growing conditions: 
Phase 1: Mycelial growth 
Temperature: 24 °C 
Humidity: 90 - 95 % 
Duration: 12 - 16 days 
CO2: 5.000 - 20.000 ppm 
Fresh air exchange: 1 per hour 
Light: n/a 

Phase 2: Primordia Bildung / Fruiting initiation 
Temperature: 10 - 15 °C 
Humidity: 95 - 100 % 
Duration: 4 - 5 days 
CO2: 500 - 1.000 ppm 
Fresh air exchange: 4 - 8 per hour 
Light: 500 - 1.000 Lux 

Phase 3: Fruiting and harvest 
Temperature: 15 - 21 °C 
Humidity: 85 - 90 % 
Duration: 4 - 8 days
CO2: < 2.000 ppm 
Fresh air exchange: 4 - 5 per hour 
Light: 500 - 1.000 Lux 

Harvesting cycle: 2 crops for 15 days each, 2 weeks apart