• The Spore Sorcery 8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate comes in a colorful box with vibrant wizard and mushroom designs, featuring a bag of sterilized grain spawn, a CVG substrate bag labeled 8LB, and mushrooms displayed in the background.
  • An 8 lb Monotub Refill Kit from Spore Sorcery, featuring a 3 lb bag of sterilized grain and a 5 lb bag of bulk substrate, sits on a wooden table. Promotional text highlights the savings when purchasing this combo together.
  • A plastic container of mushrooms sits on a wooden kitchen table, accompanied by text promoting the Spore Sorcery 8 lb Monotub Refill Kit – featuring 3 lb sterilized grain and 5 lb plant-based bulk substrate. Highlighted benefits include a longer shelf life, no foul odors, and higher yields compared to manure substrates—perfect for pairing with sterilized grain spawn for optimal mushroom cultivation results.
  • Close-up of milo sorghum grains, a pile of white gypsum powder labeled “Enriched with Gypsum,” and a mushroom substrate bag highlighting premium mushroom feed and high yields—essential components in the Spore Sorcery 8 lb Monotub Refill Kit (3 lb Sterilized Grain & 5 lb Bulk Substrate), ideal for use as sterilized grain spawn or as part of your monotub cultivation setup.
  • A close-up of the mixed substrate from Spore Sorcery’s 8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate features a text overlay listing ingredients: coco coir, vermiculite, gypsum, and azomite. A circle draws attention to the sterilized grain spawn, demonstrating the convenience of this complete kit for mushroom growers. The yellow background with purple text highlights how this kit supports optimal mushroom growth.
  • A comparison is made between two mushroom refill kits: the Spore Sorcery 8 lb Monotub Refill Kit – featuring 3 lb of sterilized grain and 5 lb of premium bulk substrate in durable, contamination-resistant bags – and a lower-quality alternative that poses contamination risks and uses inferior materials. Text and icons emphasize the clear advantages of the reliable Spore Sorcery kit over less dependable options.
  • Spore Sorcery’s 8 lb Monotub Refill Kit – featuring 3 lb of sterilized grain and 5 lb of bulk substrate – comes with a plastic bag fitted with a 0.5 micron air filter patch, ensuring optimal airflow for your mushrooms. This setup helps you achieve bigger flushes and reduces the risk of failed or wasted grows. The image showcases vibrant mushrooms with an arrow, emphasizing these benefits.
  • Two plastic bags filled with Spore Sorcery sterilized grain from the 8 lb Monotub Refill Kit (3 lb Milo Sorghum grain, 5 lb bulk substrate) rest on a metal shelf. An inset image shows mushrooms growing in a plastic container. Text reads: Strict Quality Measures: Milo Sorghum is double washed, soaked in RO water, and never force-hydrated. Ideal for your Monotub Refill Kit or combining with CVG substrate for dependable mycology results.
  • A group of brown mushrooms sits beside a list of features on a yellow wavy background with bold text: Grow Better With Proven Quality. Ideal for home cultivators, this scene showcases key products from Spore Sorcery, including the 8 lb Monotub Refill Kit—complete with 3 lb Sterilized Grain and 5 lb Bulk Substrate—providing everything you need for thriving mushroom cultivation.
  • A promotional image for the Spore Sorcery 8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate, showing bags of sterilized grain and bulk substrate with text: Grow up to 3 lb of fresh mushrooms. Spores are not included.
  • A graphic highlighting the ingredients in Spore Sorcery’s 8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate: includes 3 lb sterilized milo sorghum grain and 5 lb of a premium CVG substrate. Featured nutrients are milo sorghum, coco coir, vermiculite, azomite, and gypsum.
  • Three images: soil with small pebbles, a hand holding a block of Spore Sorcery’s 8 lb Monotub Refill Kit – featuring 3 lb Sterilized Grain & 5 lb Bulk Substrate with mushrooms sprouting, and a container of harvested mushrooms on a wooden surface. Text above reads, GROW LIKE MAGIC!.
  • Comparison of two mushroom refill kits: The Spore Sorcery 8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate offers clean, plant-based ingredients in thick, hydrated bags, with premium sterilized grain spawn and quality CVG substrate. Competing refill kits are often packaged in thin bags, are dry or contaminated, and may use cheap fillers in their grain mix. Text and images clearly highlight these differences.
  • A bold purple graphic featuring the message “We Never Compromise on Quality” alongside icons of an approval badge, a wizard, and a mushroom grow bag. Text spotlights mycologist endorsements, 30 years of expertise, and extra-large bags—all part of the Spore Sorcery 8 lb Monotub Refill Kit (3 lb sterilized grain & 5 lb premium CVG bulk substrate), expertly prepared to deliver optimal results for every home cultivator.
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8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate

8 lb Monotub Refill Kit – 3 lb Sterilized Grain & 5 lb Bulk Substrate

$42.99 USD
$49.99 USD $42.99 USD
$0.34 oz
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Shipping calculated at checkout.

Keep your grow cycle going with a complete monotub refill: 3 lbs of sterilized milo sorghum grain spawn and 5 lbs of pasteurized bulk substrate, ready to use straight out of the bag.

Made for growers who want to run the next batch without buying a whole new kit. Add your liquid culture (sold separately) and go.

What's included

  • 3 lbs sterilized milo sorghum grain spawn: double-washed and soaked overnight in RO water, enriched with gypsum, then vacuum-sealed.
  • 5 lbs bulk substrate: coco coir, vermiculite, gypsum and Azomite, pasteurized and hydrated to field capacity.

Why growers refill with us

  • No prep work: nothing to soak, mix or sterilize — inoculate, mix and maintain humidity.
  • Plant-based substrate: longer shelf life and no odor.
  • Fast colonization: hydrated to field capacity with the minerals mycelium needs for multiple flushes.
  • Clean and sealed: lab-tested, heat-sealed with a 10 mm industrial seal in thick 3 mil bags.
  • 0.5 micron filter patch: proper airflow without letting contaminants in.
  • Fits most monotubs: a straight swap for your next run.

Why Spore Sorcery? Over 30 years of mycology experience, and every batch made fresh in a sterile commercial facility and lab-tested before it ships.

Note: This kit contains no mushrooms or mushroom culture. It is a sterilized growing medium for home mushroom cultivation.

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