Amazon.com : 100 Grams of Shiitake Mushroom Spawn Mycelium to Grow Gourmet and Medicinal Mushrooms at Home or commercially - Use to Grow on Sawdust Blocks - G1 or G2 Spawn :
Shiitake Mushroom Grain Spawn (3790) | Little Acre
Shiitake Grain Spawn — Fungaia Farm
Shiitake LE3790 Grain Spawn | Block Production Strain
First attempt at grain spawn (shiitake). Looks very gray, is this normal? : r/mycology
Number 1 Son Shiitake Mushroom Organic Plug Spawn for logs
SHIITAKE EDODES MUSHROOM GRAIN SPAWN 1.5KG (954) - House of Mushroom