Monotub Refill Kits – Small, Medium & Large

Refresh your grow setup with everything you need to spawn and fruit mushrooms in your monotub—just add your genetics. These refill kits are designed for simplicity, sterility, and reliable results at every stage of mushroom cultivation.

Each kit is tailored to match specific monotub sizes and includes sterile grain, pasteurized CVG substrate, and personal protective equipment. Choose the right size for your setup below:

Freshly prepared for every order. All grain and substrate are sealed in filtered grow bags to minimize contamination risk and maximize success. Ideal for beginners and experienced cultivators alike.