Mushrooms can be grown on logs placed outside in stacks. Sterilisation is not performed with this method. Tree logs can be inoculated with wooden dowels, then allowed to grow as they would in wild conditions.
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Mushroom Plugs/dowels - PrimeFungi
Shiitake Mushroom Plug Spawn Dowels (100) – Liquid Fungi
With a pot of 100 wooden dowels, you can inoculate your own logs and enjoy an abundant harvest of delicious Shiitake mushrooms. Experience the
Shiitake Dowels
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Grow mushrooms outside: Dowels for making mushroom logs - Helsieni