All our pre-sterilized substrates are guaranteed sterile and ready for use with almost any kind of mushroom culture or spores. Get growing with Mushbox quality substrates.

Sterilzed Substrates

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Great for starting spawn for casing, bulk substrates or just as a master grain spawn. Made with precision and care.
These are the best substrate jars on the market or your money back! We stand behind our secret recipe containing all organic ingredients. You can get up to 1 ounce of fresh mushrooms per jar!
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