Pleurotus ostreatus. This is a very productive commercial strain of blue oyster from Pennsylvania. It produces dense clusters with dark gray/blue caps. It produces best in cooler temperatures but also performs well during the warmer months. Averages 1-2 lbs first flush off of 5 lb supplemented sawdust blocks but will also produce off sterilized straw substrate.

Pleurotus ostreatus. An alternative blue oyster strain. Darker and denser than our PO1 with a more impressive first flush but a lower tolerance for warm temperatures. A serious Oyster with a serious name.

Pleurotus ostreatus. A slightly more delicate, hot weather loving blue oyster with shades of beige to pale gray-blue.

Pleurotus ostreatus. High-yielding, thick-stemmed "King Blue" oyster strain from Mossy Creek.

Oyster mushroom grain spawn can be mixed into sterilized or lime pasteurized substrates including but not limited to hardwood sawdust, straw, and coffee grounds. 

Note: Grain spawn must be mixed with bulk substrate before you can fruit it. If you are new to growing mushrooms, we recommend purchasing a book on mushroom cultivation.

Recommended reading:

'Growing Gourmet and Medicinal Mushrooms' by Paul Stamets

'Organic Mushroom Farming and Mycoremediation' by Tradd Cotter

Oyster spawn can be spread in chopped straw or wood chips as shown in the video below! Making outdoor beds is one of the easiest methods for growing any type of oyster mushroom.

For our complete mushroom beds pamphlet, click here. 

Be sure to use clean, untreated products when making outdoor beds.

If you don't plan to use immediately, you can refrigerate your spawn for up to 4 months.

Grain Spawn FAQ