How to Make Straw and Sawdust Bulk Substrate

Supplies List

  • 10 cups of Sawdust
  • 10 cups of Straw
  • 1 Tablespoon of Gypsum
  • 5 gallon bucket
  • Pressure cooker
  • 5 pound Bulk Substrate bag


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01:05 STEP 1:
Soak straw, sawdust, and gypsum in a 5 gallon bucket for 24 hours.
02:06 STEP 2:
After a 24 hour soak, drain the straw and sawdust and mix together.
02:47 STEP 3:
Then, put mixture in a 5 pound bulk substring bag with a filter
03:15 STEP 4:
Sterilize bags at 15 PSI for 2 hours
04:26 STEP 5:
Let the substrate cool down for 24 hours and then it is ready to use.

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