Uncle Myc's CVG All-In-One Mushroom Spawn Bag

It's a single bag that combines a pre-sterilized grain layer—comparable to our rye berry grain sterilized mushroom spawn bag—with a premium CVG substrate layer. This design lets you go straight from inoculation to fruiting without preparing your own substrate.

Use a syringe to inject spores or liquid culture through the self-healing injection port. The port reseals itself after injection, keeping the bag sterile and contaminant-free.

Every bag is sterilized in certified autoclaves before it ships, giving your culture a clean starting point. The integrated filter patch then maintains proper gas exchange throughout colonization while blocking contaminants from entering.

No. The CVG substrate layer is already portioned and sterilized inside the bag. While this kit uses CVG, we also offer manure blend mushroom substrate for growers targeting different species.

The 4lb bag suits smaller grows and test batches. The 7lb bag offers a larger substrate volume. If you are scaling up and prefer to mix your own bags, consider Uncle Myc's Master's Mix bulk substrate.

Yes. The all-in-one design removes the most error-prone steps in mushroom cultivation, including substrate sterilization and layering. It's built to give first-time growers a reliable, low-risk path to their first successful flush.