How to Grow Mushroom Mycelium with Potatoes

Potato water is a nutrient rich medium that works well for growing mushroom mycelium because it contains key compounds that support fungal growth. Potato water contains starch and simple sugars that serve as an energy source for mycelium. As the potatoes are boiled, starches break down into smaller, more accessible sugars like glucose, which the mycelium can metabolize to fuel growth and development. Potatoes also release important vitamins and minerals into the water like Potassium, Magnesium, Phosphorus and Vitamin C.

Potato water can also be used when making agar plates which makes this a convenient and cost effective ingredient.

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