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Midwest Grow Kits Monotub Refill Kit: grain spawn bag, dark substrate bag with label, and six round filters.
Six-panel visual guide: mushroom cultivation from spore injection, mycelium growth, substrate mixing, to harvest.
Midwest Grow Kits Monotub Refill Kit: grain spawn bag, dark substrate bag with label, and six round filters.
Six-panel visual guide: mushroom cultivation from spore injection, mycelium growth, substrate mixing, to harvest.
Extra 10% Off

Midwest Grow Kits Complete 44Q Monotub Refill Kit

Price:
$59.99 USD
Or
Pay as little as
$5999/mo
for a term that suits you, up to 36 months. Learn More
⚡ HOLIDAY OFFER! 10% off this item Ends: January 5th
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MODEL: RFL44
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Midwest Grow Kits Complete 44Q Monotub Refill Kit

Ready to start your next cultivation cycle? The Midwest Grow Kits Complete 44Q Monotub Refill Kit provides all the essential mushroom growing supplies you need to revitalize your existing monotub setup. It's the perfect, cost-effective solution for experienced growers looking to maintain continuous harvests without buying a whole new 44Q Monotub Bulk Spawn Growing & Casing Kit.

This comprehensive refill package includes a premium 5-grain spawn bag, ready for inoculation with your preferred spore syringe or liquid culture. Once colonized, simply mix it with the included 7.5 pounds of pre-pasteurized Select Bulk Substrate, which is specially formulated to encourage vigorous mycelium growth and abundant fruiting.

The kit also features six replacement monotub filter disks to maintain optimal airflow and a custom-fit black monotub liner to retain moisture and simplify cleanup. By choosing this all-in-one refill from Midwest Grow Kits, you save time and money while ensuring all components are perfectly compatible.

What's Included

  • 5-Grain Spawn Bag
  • 7.5 Pounds of Select Bulk Substrate (pre-mixed and pasteurized)
  • 6 Monotub Filter Disks
  • Custom-Fit Black Monotub Liner

Features

🌾
Premium Grain Spawn

Sterilized 5-grain bag provides the perfect nutritional foundation for strong, resilient mycelium.

🧱
Optimized Bulk Substrate

7.5 lbs of pre-pasteurized substrate formulated for vigorous colonization and abundant fruiting.

💨
Fresh Filter Disks

Six replacement filters maintain ideal gas exchange while protecting against airborne contaminants.

✨
Custom-Fit Liner

Prevents side-pinning, maintains moisture, and makes post-harvest cleanup significantly easier.

Specifications

Specification Value
Compatible With Medium 44Q Monotub
Spawn Bag Type 5-grain, pre-sterilized
Substrate Weight 7.5 pounds
Substrate Type Pre-mixed, pasteurized Select Bulk
Filter Disks Included 6
Liner Type Custom-fit black monotub liner
Recommended Culture Amount 5cc of spore syringe or liquid culture (not included)

FAQs

What is included in this refill kit?+

This kit contains everything you need to start a new cycle in your existing monotub: one 5-Grain Spawn Bag, 7.5 pounds of pre-pasteurized Select Bulk Substrate, six replacement Monotub Filter Disks, and one Custom-Fit Black Monotub Liner.

Do I need anything else to start growing?+

Yes. This is a refill kit and does not include the monotub itself. You will also need to provide your own spore syringe or liquid culture to inoculate the grain spawn bag.

Is this kit suitable for beginners?+

This kit is designed for growers who already have a monotub. If you are just starting out, we recommend a complete system from our range of mushroom grow kits, such as the Simple Mushroom Grow Kit Plus, to ensure you have everything you need.

How much culture or spore solution should I use?+

We recommend injecting 5cc of your preferred spore syringe or liquid culture into the 5-grain spawn bag for optimal colonization.

Can I use this with a different size monotub?+

This kit is specifically measured for a 44-quart monotub. Using it in a different size tub may result in a substrate depth that is too shallow or too deep. For larger setups, consider the Complete Large 66Q Monotub Refill Kit to ensure you have enough substrate.

What is the benefit of the pre-pasteurized substrate?+

Using pre-pasteurized substrate saves you a significant amount of time and effort. It arrives ready to use, eliminating the complex and messy process of pasteurizing it yourself, which helps minimize the risk of contamination and gets your grow started faster.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

  • Most orders are processed within 24-48 hours after being placed.
  • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

  • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
  • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
  • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

  • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
  • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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