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Calcium sulphate, otherwise known as gypsum, is an inert non-nutritious powder used in mushroom cultivation in three main ways: Added to grain when making grain spawn to help break it up once fully colonised. Mixed with the main substrate on which...

ORGANIC Rye Grain Rye grain* (contains GLUTEN). Allergy advice: see ingredients in bold. Ingredients from more than one country. Milled in the UK. *Organic produce. Storage: store in cool dry conditions. Avoid direct sunlight.

So golden, so beautiful and uniform. “So many points of contact, would absolutely eat here every time. A+++” - Mycelium if it could leave reviews.  

It’s a scoop. It’s super lightweight and is perfect for filling bags with substrates and grain.

Often found on the floor of cinemas, this also makes a perfect spawn substrate, the larger grains and balanced nutritional content make for quick colonisation.