Mushroom Growing Bags Mycelium Substrate High Temperature W 4″ x D 3.5” x L 13”Perfect for grain spawn, rye grain, wood chips, and various substrates. 4″ Wide 3.5″ Gusset 13″ Long Ideal size to grow mushroom bags at home, fits perfectly into a Pressure cooker, and the transparent mushroom bags makes it easy to observe…

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