Best-Selling Substrates

Browse our best-selling mushroom substrates and grain supplies in one place. This collection brings together prepared fruiting substrates, sterilized grain bags, and mushroom grain jars, with the current selection shown below.

Choose mushroom substrate to use with compatible, fully colonized spawn, or sterilized grain to inoculate and grow into spawn first. For the full range, shop mushroom substrates, sterilized grain bags, mushroom grain jars, and bulk substrate packs.