• A colorful Monotub Refill Kit box with the Spore Sorcery logo and wizard graphics holds a bag of sterilized milo sorghum grain spawn and premium CVG bulk substrate, hydrated and nutrient-enhanced, with white mushrooms beside it.
  • A promo image displays the Monotub Refill Kit: Sterilized Milo Sorghum Grain Spawn and Premium CVG Bulk Substrate—hydrated and nutrient-enhanced. Save by buying together! Includes 3lb grain spawn + 5lb CVG substrate.
  • A Monotub Refill Kit with sterilized milo sorghum grain spawn and premium CVG substrate sits on a kitchen counter. Text highlights longer shelf life, no foul smell, and higher yields vs manure—ideal for use with sterilized grain spawn.
  • Close-up of Milo Sorghum grains labeled "Hydrated & Nutrient-Enhanced," next to a bag marked "Mix with our Monotub Refill Kit or CVG Substrate for huge yields!" on a purple background. Includes sterilized grain spawn and premium CVG bulk substrate.
  • Close-up of Premium CVG Bulk Substrate with white and tan particles from the Monotub Refill Kit, which includes Sterilized Milo Sorghum Grain Spawn. The hydrated, nutrient-enhanced mix is ready for improved yields.
  • Comparison graphic shows our Monotub Refill Kit with sterilized milo sorghum grain spawn and premium, hydrated CVG substrate, versus their kits with poorly packed grains in thin bags—highlighting superior quality and safety.
  • A clear bag of Monotub Refill Kit shows a white 0.5 micron air filter patch on sterilized Milo sorghum grain spawn with premium CVG substrate. Text highlights the patch’s benefits, while cartoon mushrooms decorate the bottom left corner.
  • Two bags of sterilized Milo Sorghum grain spawn from the Monotub Refill Kit are stacked in a lab. An inset shows mushrooms in a container. Text: Premium CVG substrate, hydrated & nutrient-enhanced; strict quality control—no forced hydration.
  • Graphic titled “Grow Better with Proven Quality” showing benefits: 30+ years mycology expertise, lab-tested premium CVG substrate, sterilized Milo Sorghum grain spawn, industrial sealing, and top-tier kit—next to a mushroom cluster.
  • Grow up to 3 lb of mushrooms with the Monotub Refill Kit—includes sterilized milo sorghum grain spawn and premium hydrated CVG substrate. Lab tested, secure, spores not included. Two substrate bags shown.
  • Infographic of mushroom growing supplies: Monotub Refill Kit with sterilized Milo sorghum grain spawn and premium CVG bulk substrate, hydrated and nutrient-enhanced. Includes coco coir, vermiculite, and Azomite.
  • Three images display nutrient-rich soil, mushrooms in hand, and countertop jars with "Grow Like Magic!" above—perfect inspiration for your next Monotub Refill Kit featuring sterilized milo sorghum grain spawn and premium hydrated CVG substrate.
  • Infographic comparing two mushroom grow kits: The top highlights “Monotub Refill Kit” with sterilized milo sorghum grain spawn and premium, hydrated, nutrient-enhanced CVG substrate; the bottom shows competing kits’ drawbacks with red Xs and plain packaging.
  • A promo graphic reads: We never compromise on quality—proven, reliable & guaranteed! Featuring mycologist approval, 30 years’ mushroom growing expertise, and the widest Monotub Refill Kit with sterilized Milo Sorghum spawn & premium CVG substrate.
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Monotub Refill Kit | Includes: Sterilized Milo Sorghum Grain Spawn Premium CVG Bulk Substrate | Hydrated & Nutrient-Enhanced

Monotub Refill Kit | Includes: Sterilized Milo Sorghum Grain Spawn Premium CVG Bulk Substrate | Hydrated & Nutrient-Enhanced

Keep your grow cycle going strong with this complete Monotub Refill Kit, featuring 3 lb of sterilized Milo Sorghum grain spawn and 5 lb of premium CVG substrate. Professionally sterilized, nutrient-enhanced, and contamination-free, this refill pack delivers fast colonization, high yields, and multiple flushes. Designed for easy use and compatible with most small monotub grow kits, it lets you simply inoculate, mix, and maintain humidity. Ideal for hobbyists and seasoned cultivators who want reliable results without buying a full kit, this refill keeps your mycology projects thriving batch after batch.

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

  • Complete Monotub Refill Kit: Includes sterilized Milo Sorghum grain spawn (3 LB) & premium CVG bulk substrate (5 LB). Just add your own spores and keep your mycology journey going.
  • Fast Colonization & High Yields: Nutrient-enhanced grain and substrate provide optimal moisture, aeration, and minerals for faster mycelium growth and multiple flushes.
  • Professionally Sterilized & Contamination-Free: Grain spawn is double-washed in RO water, enriched with gypsum, and vacuum-sealed to ensure a clean, contamination-free growing environment.
  • Compatible & Easy to Use: Works with most small monotub grow kits for a seamless refill. Simply inoculate, mix, and maintain humidity - no extra prep required.
  • Just Keep Growing: Perfect for hobbyists and experienced growers looking to replenish materials without buying a full kit. Grow like magic, batch after batch!
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