Uncle Myc's Master's Mix All-In-One Mushroom Spawn Bag - 4lbs

It's a single bag combining a pre-sterilized grain spawn layer with a Master Mix substrate — a 50/50 blend of soy hulls and hardwood sawdust. This design takes you from inoculation to fruiting without preparing your own substrate.

Master Mix uses a soy hull and hardwood sawdust blend instead of coco coir, vermiculite, and gypsum. This composition is richer in nutrients, making it well-suited to gourmet species that need more substrate density than CVG typically offers.

Use a syringe to inject spores or liquid culture through the self-healing injection port. The port reseals itself afterward, keeping the bag sterile throughout colonization.

Every bag is sterilized in certified autoclaves before shipping, and the integrated filter patch maintains proper gas exchange throughout colonization while blocking contaminants from getting in.

Yes. The all-in-one design removes the most error-prone steps in cultivation, including substrate sterilization and blending. It gives first-time growers a reliable path to their first flush.

Most growers get 2-3 flushes from a single Master Mix bag before substrate nutrients are exhausted. The nutrient-dense soy hull and hardwood blend is formulated to support strong yields across each flush, not just the first.