Black Pearl King Oyster Grain Spawn 5 LBFully colonized Black Pearl King Oyster (Pleurotus ostreatus eryngii) grain spawn, 5 LB, grown on our millet based grain blend in a filtered Unicorn 3T bag. Built on premium first generation genetics and produced fresh at our Illinois lab fully colonized before it ships and ready to break up and inoculate the moment it arrives. A prized cross of Oyster and King Oyster, Black Pearl produces dramatic dark grey black caps over thick, meaty stems pairing

Sealed sterile plates (parafilm or saran wrap around the edge) stored refrigerated at 35–40°F stay viable for 30–60 days before use

rye berries

Colonizing rapidly on a wide variety of substrates

oak/sugar maple/beech logs Block colonization time 2–4 months on sawdust blocks (includes browning/maturation phase) Fruiting temperature 50–70°F (cooler temps produce the classic cracked-cap appearance) Cap color Light to dark brown

Already have a 66Q Large Grower’s Select Monotub

Pink Oyster Mushroom Fast Facts

pink or orange bacterial sheen with sour smell

or casual outings

Whether you're fruiting trays

Substrate: Bulk substrate blend prepared for fruiting

Medicinal & Functional Benefits

or up to 120 days refrigerated at 35–40°F