Rice Flour - 250 grams

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Rice flour 250 grams: the nutrient source in your substrate Rice flour is one of the oldest ingredients in home mushroom growing. It supplies the starches and proteins the mycelium feeds on, and because it is finely milled it spreads evenly through the rest of the mix. This bag holds 250 grams of organic rice flour. On its own it is not a growing medium: it is almost always combined with vermiculite, which holds moisture and keeps the structure open and airy. That combination is known as the...