Understory Mushroom Co.

How we grow

Substrate, spawn and the fruiting cycle

Every block starts as the same hardwood sawdust and bran mix, sterilized in a pressure vessel so nothing but our spawn gets a foothold. Colonization takes two to three weeks in the dark before a block is ready to fruit.

Fruiting is a shock on purpose - a drop in temperature and a jump in humidity that tells the mycelium conditions outside have changed. Each room runs its own recipe, because a lion’s mane wants different air than an oyster.

A single block flushes two or three times before it is spent, about ten days apart. Spent blocks go to a local compost operation rather than the trash.

Rows of mushroom grow blocks on wire racks inside a dim, humid grow room
Understory Mushroom Co.(555) 0173
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