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All our un-sterilized substrates are guaranteed for intact delivery and can be used to kick start almost any kind of mushroom culture or spores. Get growing with Mushbox quality substrates.

Un-Sterilized Substrates

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Shredded Wheat Straw
Shredded Wheat Straw
A must have substrate for extending the life and growth of any grain based mushroom. Pasteurize this substrate at 175 degrees F for one hour and then let dry for up to 5 hours before use.
$16.99 $15.99
Sale
Horse Manure
Horse Manure
This manure from Mushbox has been leeched, aged and dehydrated to ensure that all ammonia has been flushed out to perform to its ultimate capabilities within your mushroom substrate.
$16.99 $15.99
Sale
Mushroom Casing Soil
Mushroom Casing Soil
Essential ingredient in "casing techniques". This soil is buffered with hydrated lime to a PH of 7.0. This fools your mushrooms into thinking there is no more food and subsequently form mushrooms. 12 cup portion.
$8.99
 
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