Complete Large 66Q Monotub Bulk Spawn Growing & Casing Kit

The Complete Large 66Q Monotub Bulk Spawn Grow & Casing Kit is a beginner-friendly, all-in-one solution for growing mushrooms using bulk substrates. Designed to simplify larger-scale cultivation, this kit provides everything needed to achieve consistent colonization and reliable fruiting—without complicated equipment or advanced techniques.

At the center of this system is a 66-quart Grower’s Select Monotub, engineered to maintain proper airflow and moisture retention throughout the growing cycle. Paired with premium bulk substrate, sterile grain spawn bags, and casing materials, this setup creates a stable environment for strong, repeatable flushes.

Whether you’re upgrading from jar-based growing or starting directly with bulk methods, this kit removes the guesswork from monotub cultivation. Clear, step-by-step instructions guide you through spawn colonization, substrate mixing, casing, and fruiting—all in one streamlined system.

Just add your preferred spore syringe or liquid culture to begin growing at home with confidence.

Why Growers Choose This Kit

•  True All-In-One Bulk Growing System – Includes monotub, substrate, spawn, casing materials, and accessories.
•  Beginner-Friendly Bulk Method – Designed to make monotub cultivation approachable, even for first-time bulk growers.
•  Large 66-Quart Capacity – Spacious chamber supports higher yields with proper airflow and humidity balance.
•  Premium Casing & Substrate Materials – Formulated to retain moisture and support strong, healthy growth.
•  Versatile Species Compatibility – Suitable for a wide range of gourmet and medicinal mushrooms.

What’s Included

(Everything you need for bulk mushroom growing—just add spores or liquid culture.)

• Custom 66-Quart Grower’s Select Monotub (22.5″ × 15.5″ × 12″)
• (2) Sterile 5-Grain Spawn Bags
• 10 lb Select Bulk Substrate – Pasteurized and ready to use
• 1 Quart Vermiculite – For casing and moisture retention
• (6) Monotub Filter Disks – Balanced airflow and protection
• (6) Incubation Hole Plugs
• Black Monotub Liner – Reduces side pinning and simplifies cleanup
• 8-oz Fine-Mist Spray Bottle
• Step-By-Step Bulk Growing Guide

Technical Specs

Real Results from a 66Q Monotub Grow

Below is an example of a successful fruiting run using the 66Q Monotub Grow Kit, showing dense, healthy mushroom development under proper bulk-growing conditions.

Worried About Temperature?

Growing in a cooler space? Add a Liquid Graphite Heating Mat to this monotub kit for just $12.99 and save 35%. Gentle, even heat helps maintain ideal incubation temperatures for reliable year-round growing.