Black Oyster (Pleurotus ostreatus) mushroom grain spawn ready for grain-grain transfer or transfer to a bulk substrate for fresh home grown mushrooms!
Sold and shipped fully colonized in a 250mL or 500mL mason jar outfitted with a filter for air exchange. Grain spawn is made-to-order and will typically take 2-3 weeks to ship to allow for robust colonization.
Other sizes are available upon request - contact firstname.lastname@example.org for more information.
NOTE: Although pictured with a reusable lid, these jars ship with a traditional mason jar lid and screw band outfitted with a filter. Our reusable grain spawn lids are available here!