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Hello Traveller,

We are taking a break until the 5th of October

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Kind regards,

Premium Mushroom Grade Gypsum 500g


  • Calcium Sulphate / Gypsum
  • Prevent grains from sticking & clumping
  • Buffers pH
  • Adds minerals which are vital for fruiting
  • Supplied in a re-sealable mylar bag for freshness
  • Clean and contaminate free
SKU: GYP Categories: ,

Mushroom Grade Gypsum 500g

In Powder form, gypsum is the perfect additive to ensure the correct pH in mushroom spawn and substrate; grain, sawdust, coir and more. Its also beneficial as it adds calcium carbonate and sulfur, which helps to stabilize PH levels. It also adds vital minerals which help produce strong and healthy flushes. You can add between 2 to 5 %.

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