3-Grain All-In-One Mushroom Grow Bag

Unlock a higher-yield, all-in-one solution for gourmet and medicinal mushroom cultivation with our 3-Grain All-In-One Mushroom Grow Bag – 4 lb. Engineered for serious growers and compact production setups alike, this 4 lb bag combines a nutrient-rich three-grain foundation (rye berries, wheat berries and millet) with a fortified casing mix, eliminating the traditional steps of transferring spawn, mixing substrate and layering casing. Each bag is pre-sterilized, pre-hydrated, and ready to inoculate — no jars, no messy prep, no separate bulk substrate work. At the base of the bag is the triple-grain blend: organic rye, wheat and millet grains cooked and hydrated to chef-level precision, delivering ideal moisture, density and nutrient profiles for vigorous mycelial colonization. Above this foundation sits a premium casing layer—rich in coco coir, vermiculite, gypsum and added nutrients—to retain moisture, support pin-set development and maximize flush potential. The union of grain spawn a