These substrate bags come ready to use. Simply add your desired grain spawn and allow to colonize. Inoculation with grain spawn (grain that's been colonized with your chosen fungus) is highly recommended. We do not recommend inoculating with agar or liquid culture. You can purchase a grain bag here to make your own grain spawn first! Supplemented hardwood substrates are ideal for wood lovers like Lions Mane, Maitake, Oysters and many others. We use a 50/50 mix of Oak Hardwood and Soybean Hulls in our substrate bags. Our substrate contains the perfect amount of water for awesome flushes. This 50/50 recipe of soybean hulls and sawdust often been referred to as Master's Mix as named by T.R. Davis of Earth Angel Mushrooms. Refrigerate the substrate if you don't plan on using within a few days of receiving it. Please Note: We HIGHLY recommend using the substrate within 2 weeks of receiving it. Naturally, substrates contain a host of microorganisms. Like all mycology vendors, we steam pasteurize our substrate to kill off most of these possible contaminants. However, since this process isn't technically sterilization it may leave some thermally resistant spores behind. This is widely known and accepted in mycology because at this stage you're introducing a substantial amount of fungus (spawn) that will quickly take over the substrate.
