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Growing Mushrooms: PF Tek

Step 3Mix the substrate

Mix the substrate
The substrate is what the fungus will feed off of. It will consist of brown rice flour, vermiculite and water. First, take the dry ingredients and mix them in a bowl. After they are well mixed add the water.

For 12x 250mL (~8oz):

-9 cups vermiculite
-3 cups brown rice flour
-3 cups water

For my mixing bowl I halfed the amounts above and mixed only half the substrate at a time.

I have heard of adding 'worm castings' (earthworm poop) to substrate to give better flushes of mushrooms.
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