Substrate Preparation

Recipes, grain prep, pasteurization, and sterilization methods for every substrate type.

103 tips across 8 topics

Substrate Basics

15 tips

  • What is substrate in mushroom cultivation?
  • What is the difference between substrate and spawn?
  • What do mushrooms actually eat in substrate?
  • +12 more...

Grain Spawn Preparation

13 tips

  • What grains work best for mushroom spawn?
  • How do you prepare rye grain for mushroom spawn step by step?
  • How do you prepare wild bird seed (WBS) using Foo Man's method?
  • +10 more...

Bulk Substrate Recipes

11 tips

  • What is the CVG substrate recipe for mushroom growing?
  • What is Masters Mix and how do you prepare it?
  • How do you prepare straw as a mushroom substrate?
  • +8 more...

Pasteurization Methods

10 tips

  • How do you pasteurize substrate using bucket tek (boiling water pour-over)?
  • How do you pasteurize substrate with a hot water bath?
  • How does cold water lime pasteurization work?
  • +7 more...

Sterilization Methods

10 tips

  • How do you sterilize mushroom substrate in a pressure cooker?
  • What is the difference between a pressure cooker and an autoclave for mushroom growing?
  • How long do you sterilize at 15 PSI for each substrate type?
  • +7 more...

Advanced Substrate Techniques

20 tips

  • What is the ideal carbon-to-nitrogen ratio for mushroom substrate?
  • How do you calculate moisture content of your substrate?
  • Can you add coffee grounds to any mushroom substrate?
  • +17 more...

Best Substrate for Each Species

12 tips

  • What Is the Best Substrate for Oyster Mushrooms?
  • What Is the Best Substrate for Lion's Mane?
  • What Is the Best Substrate for Shiitake Mushrooms?
  • +9 more...

Substrate Science & Chemistry

12 tips

  • What is the carbon-to-nitrogen ratio and why does it matter for mushroom substrate?
  • What is water activity (aw) and how does it affect contamination risk?
  • How does pH affect mushroom mycelium growth?
  • +9 more...