CVG Substrate

4 lb. C.V.G. Bulk Mushroom Substrate

Elevate your home cultivation with the Merry Mushroom Maidens Non-Manure 4 lb. C.V.G. Substrate, the perfect foundation for growing your favorite non-wood-loving mushroom varieties. Handcrafted in our Missouri facility, this substrate is professionally formulated to provide the ideal moisture and nutrient balance for success.

Professional Quality You Can Trust

• Non-Manure C.V.G.: Our C.V.G. (Coir, Vermiculite, and Gypsum) blend is meticulously mixed to create the perfect structure and hydration levels that mushrooms love — without manure. Many growers prefer non-manure C.V.G. for its significantly lower contamination risk.
• Pasteurized for Success: We use top-of-the-line pasteurizing equipment to ensure every bag is professionally prepared. This process eliminates competing contaminants while leaving behind beneficial microbes, giving your colonized grain spawn the cleanest possible environment.
• Unicorn Mushroom Grow Bags: .02 Micron filter patch for optimal gas exchange.
• Generous 4 lb. Size: Our 4 lb. bags provide ample material for mono tubs or bag tech, making it easy to scale up your home hobby fast.
• Very Easy to Use: Whether you are a beginner or a seasoned pro, our substrate is ready to go. Its consistent quality takes the guesswork out of the preparation phase.
  • Oyster mushrooms (Pearl, Blue, Pink, Golden, King) — thrive on CVG
  • Wine Cap  — does well with CVG mixed into outdoor beds.
  • Pioppino — good performer on CVG blends
  • Enoki  — can work with CVG as a casing layer
  • Nameko — works with CVG as a casing
  • Chestnut  — compatible with CVG
  • Maitake— can use CVG as a casing layer
  • Reishi  — technically culinary/medicinal, grows well with CVG casing

• Note: CVG is most commonly used as a casing layer on top of a bulk substrate (like hardwood or straw) rather than a standalone substrate for wood-loving species. 

Product Features

• Premium Ingredients: High-grade coconut coir, vermiculite, and gypsum for aggressive mycelium colonization.
• Quality Control: Every mushroom substrate batch is tested and guaranteed fresh from our Missouri facility.
• Bag Technique (Bag Tec): A great way to grow mushrooms right in the bag. Simply mix colonized grain with the full 4 lb. C.V.G. and let colonize for fruiting. Great for small grow spaces.
• Versatile: The industry-standard mix for a wide variety of popular indoor-grown mushrooms (not for wood-loving species).

Ready to start your next project? Simply combine this substrate with your prepared colonized grain spawn in a clean environment and watch your mushrooms flourish.

Storage & Handling Guide

• Keep it Cool and Dark: Store in a cool, dry place away from direct sunlight. A closet or climate-controlled dark room is ideal.
• Avoid Extreme Temperatures: Do not store in a garage or shed where it may be exposed to high heat or freezing temperatures.
• Use Within 2-4 Weeks: For best moisture levels, we recommend using your substrate within 2–4 weeks of arrival.
• Sterile Handling: Wipe the outside of the bag with 70% isopropyl alcohol before opening. Always wear gloves and use sanitized tools.
• Use the Whole Bag: Best to use the entire 4 lb. bag at once. If saving a portion, reseal as tightly as possible — sterility cannot be guaranteed once the factory seal is broken.