Pasteurized 50/50 Manure and Straw Mushroom Bulk Substrate

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  • 100% Natural

This is the perfect mix of our compost and wheat straw. This mushroom substrate will produce great results for dung/straw loving fungi species. You will get much larger yields using this 50/50 mix compared to just casing grains or all-in-one grow bags. This product is sterilized and ready to use at your front door. Simply add your gourmet mushroom spawn to the 50/50 grow bag, reseal it, and mix. Out-Grow's straw/compost mix is one of the best mushroom growing substrates available on the internet. We use only natural and chemical free products to make our substrates.


Mushroomsubstrate.com uses field leached and shredded horse manure, shredded golden wheat straw, coconut coir, vermiculite and a couple other secret ingredients to produce a high quality mushroom substrate with a very nice, airy texture. Out-Grow's 50/50 mix will come heat sealed and sterilized in a mushroom grow bag for your convenience. You can grow right in the bag or add to trays or tubs to grow in.

  • Model: ms5050100
  • Shipping Weight: 1lbs
  • 985 Units in Stock
  • Manufactured by: mushroomsubstrate.com

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100% all natural products
Mushroom Substrate uses only 100% natural and organic products in our manufacturing process.

Our products do not contain any pesticides, herbicides heavy metals or anything else harmful.

This product was added to our catalog on Saturday 27 July, 2019.