Dr. Myc™ Magical Gypsum

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Magical Gypsum is tailored for mushroom cultivation and includes additional inputs that provide a number of benefits for your mushroom grow, including decreased colonization time in grain spawn, higher yields, easier application & better solubility than garden gypsum, increased nutrient uptake, increased water holding capacity in substrate, and regulated PH value of substrate.


Free shipping available for orders $100 or more. Manufacturer Direct and special order items may require extra charges. See the Docs & Downloads section for product labels and other important information. Questions? Contact us!

Product Features List
  • Increases nutrient uptake
  • Increases water holding capacity in substrate
  • Regulates the PH value of substrate
  • Decrease colonization time in grain spawn
  • Provides higher yields
  • Facilitates easy application & better solubility than garden gypsum

Dr. Myc® has specially formulated a blend of gypsum and other components like humic acid, biochar, sucrose, and MGP Microbes – MAGICAL GYPSUM – to provide growers with a better growing experience from start to finish.

Gypsum is an essential component of mushroom substrate and grain designed to support rapid colonization and heavy yields over multiple harvests.


Please select a variation to see its technical specifications


For Grain Spawn, add 2g magical gypsum to 200g Grain in jars, or 0.35 oz per pound of grain. For Substrate, add 0.8 oz magical gypsum per pound of substrate.

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