Pearl Oyster Grain Master Jar

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 Master Jar is a first- or second-generation Grain Master in a reusable 1-gallon glass jar fitted with an autoclavable lid and Synthetic Filter Disc (approximate yield per jar: ⅔ gallon). Each Grain Master 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 bo