 
                                        Pearl Oyster Grain Master Bag
Latin Name: Pleurotus ostreatusFruiting Temperature: 50–60 °F A longtime favorite of mushroom hunters, fruiting nearly year-round in lowland hardwood forests. This mushroom is easy to grow and produces prolifically on a variety of substrates, including hardwood logs or sawdust, straw, spent coffee grounds and many agricultural waste products. FP's ready-to-inoculate, pure mushroom Grain Spawn is offered in a disposable Spawn Bag with Filter Patch (approximate yield 1¼–1½ gallon). Each unit is a first- or second-generation Grain Master that can be expanded up to 1000 times its mass. Each order of mushroom grain spawn is custom-made: lead time for grain spawn is 6–8 weeks from date of order. Please note: Unlike our ready-to-grow Mushroom Patches and Mushroom Plug Spawn, our Grain Spawn does not come with instructions. It is assumed that the purchaser is sufficiently familiar with mushroom culture technique to utilize these cultures. The books Growing Gourmet & Medicinal Mushrooms and
