Blue Oyster Grain Master Jar

Latin Name: Pleurotus ostreatus var. columbinusFruiting Temperature: 45–65 °F A cool-weather variant of P. ostreatus, the Blue Oyster is similar in appearance and culinary characteristics. Cultivation strategies closely parallel that of the Pearl Oyster. Great for outdoor cultivation in cooler climates.  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 books Growing Gourmet & Medicinal Mus