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Dry Pack Substrate

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Our substrate mix, dry and ready to hydrate. This is the same mix we use in our own sterile bags, just without the water and without the cook.

Masters Mix: hardwood sawdust and soybean hull, for oysters, lion's mane and more.
Shiitake Mix: hardwood sawdust with wheat bran.
Maitake Mix: hardwood blend for maitake.

The 5 lb size comes in a filter-patch 3T grow bag. The 10 lb size comes in a larger filter-patch grow bag.

NOT STERILE: you must pressure-cook before inoculating.

Each bag holds about 2 lb (5 lb size) or 4 lb (10 lb size) of dry mix and makes about 5 lb or 10 lb of hydrated substrate.

Water to add

  • 5 lb size: 1.36 L (46 fl oz, about 5¾ cups, 3.0 lb / 1,360 g)
  • 10 lb size: 2.72 L (92 fl oz, about 11½ cups, 6.0 lb / 2,720 g)

We recommend roughly 60% moisture. If unsure, fill slightly under.

Steps

  1. Add the water per the table above. Mix well and let it soak.
  2. Pressure-cook at 15 PSI for about 2.5 hours (5 lb) or longer for 10 lb.
  3. Let it cool completely.
  4. Inoculate.
  5. Seal the bag.

Storage: keep dry and sealed. Each bag is marked with a pack date.