3x Sterilized Grain Quart Jar Organic Rye Mushroom Grain Substrate, Filtered Lids + Self Healing Injection Port. This is a reliable way to spawn many types of mushrooms, and it can't get easier than pre-sterilized grain jars from Doom Loop Naturals. Instructions included! (Note: We find that most mushroom mycelium spawn best with extra headspace above the grain, the filled jars you receive were 3/4 full prior to heat sterilization. The grain tends to compact during the pressurized sterilizing process).
