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Midwest Grow Kit: clear monotub, grain spawn bags, bulk substrate, vermiculite, filter patches, spray bottle.
Clear plastic mushroom growing kit with a dark tray, filled with many small, brown-capped mushrooms. "Grower's SELECT" logo.
Mushroom monotub grow kit instructions: injecting spores, mycelium colonization, mixing substrate, pinning, and harvesting mature mushrooms.
Midwest Grow Kit: clear monotub, grain spawn bags, bulk substrate, vermiculite, filter patches, spray bottle.
Clear plastic mushroom growing kit with a dark tray, filled with many small, brown-capped mushrooms.
Mushroom monotub grow kit instructions: injecting spores, mycelium colonization, mixing substrate, pinning, and harvesting mature mushrooms.
Extra 10% Off

Midwest Grow Kits Complete Large 66Q Monotub Bulk Spawn Growing & Casing Kit

Reduced Price:
$109.99 USD $99.99 USD$109.99 USD
Or
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$9999/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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Midwest Grow Kits Complete Large 66Q Monotub Bulk Spawn Growing & Casing Kit

Ready to take your mushroom cultivation to the next level and achieve massive yields? The Midwest Grow Kits Complete Large 66Q Monotub Kit is your all-in-one solution for successful bulk cultivation, removing the complexity and guesswork from large-scale growing.

This comprehensive system is the premier large-scale option in the Midwest Grow Kits lineup, designed for both beginners ready to move beyond jars and experienced cultivators seeking to maximize production. It features a spacious 22.5"x15.5"x12" custom-designed monotub with precision-engineered airflow and humidity controls. Significantly larger than the 44Q version, this kit provides ample space for impressive harvests.

The kit includes two 5-grain spawn bags for robust mycelium development and 10 pounds of premium, pre-pasteurized Select Bulk Substrate, ready for immediate use. Simply inject your chosen spores or liquid culture, allow for colonization, and mix with the substrate. The included vermiculite casing layer and black liner create the perfect microclimate for optimal fruiting while preventing side pinning. When you're ready for another cycle, the Complete Large 66Q Refill Kit makes it easy to start again.

What's Included

  • Custom designed Monotub (22.5"x15.5"x12" - 66Q size)
  • Two (2) 5-grain Spawn Bags
  • 10 Pounds of Select Bulk Casing mix (pre-mixed and pasteurized)
  • One (1) Quart of Vermiculite
  • Six (6) Monotub Filter Disks
  • One (1) Black Monotub Liner
  • One (1) 8oz Spray Mister
  • Six (6) Monotub Incubating Hole Plugs
  • Step-by-Step Bulk Growing Guide

Features

🍄
High-Capacity Monotub

A massive 66-quart growing chamber engineered for maximum yields and efficient use of space.

🌱
Dual Spawn System

Includes two pre-sterilized 5-grain spawn bags for rapid, vigorous, and widespread colonization.

🧱
Premium Bulk Substrate

10 lbs of pre-pasteurized substrate perfectly formulated for dung-loving mushroom species.

💨
Advanced Climate Control

Complete with filter disks, hole plugs, and a mister to maintain the ideal microclimate for fruiting.

Growing Process

This kit is the perfect next step for growers who have mastered jar cultivation. The bulk growing process is simple:

  1. Inject 5cc of your preferred spore syringe or liquid culture into each spawn bag.
  2. Allow the spawn bags to fully colonize with mycelium (typically 2-3 weeks).
  3. Break up the colonized spawn and mix thoroughly with the Select Bulk casing mix in the monotub.
  4. Apply the vermiculite casing layer to create ideal surface conditions for pinning.
  5. Install the filter disks during the fruiting phase to maintain proper fresh air exchange.
  6. Use the included mister to maintain optimal surface moisture as your mushrooms grow.

The 66-quart capacity significantly increases potential yields compared to smaller mushroom grow kits, making it ideal for maximizing production efficiency.

Specifications

Specification Value
Monotub Dimensions 22.5" x 15.5" x 12"
Monotub Capacity 66 quarts
Spawn Bags 2x 5-grain, pre-sterilized
Substrate Weight 10 pounds
Vermiculite Amount 1 Quart
Filter Disks 6
Incubating Hole Plugs 6
Spray Mister Capacity 8 oz
Recommended Culture 5cc per spawn bag (not included)

FAQs

What else do I need to start growing?+

This kit contains all the core components for bulk cultivation. You will only need to provide your own mushroom spores or liquid culture in a syringe to inoculate the spawn bags. Everything else is included!

Is this kit good for beginners?+

Yes, this kit is an excellent choice for ambitious beginners looking to start with a large setup or for intermediate growers upgrading from smaller kits. It simplifies the bulk growing process by providing pre-sterilized and pre-pasteurized materials, which significantly reduces the risk of contamination.

How is this different from the 44Q kit?+

The primary difference is size and yield potential. This 66-quart monotub offers over 50% more cultivation space than the Midwest Grow Kits 44Q Monotub Kit, allowing for significantly larger harvests in a single run.

What kind of mushrooms can I grow with this kit?+

The Select Bulk Substrate is specifically formulated to be an ideal growing medium for most dung-loving mushroom species.

Can I reuse the monotub for future grows?+

Absolutely! The monotub is durable and can be cleaned, sanitized, and reused for many grows. When you're ready for your next batch, we offer a convenient 66Q Monotub Refill Kit that includes fresh spawn bags and substrate.

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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