44Q Monotub Bulk Spawn Growing & Casing Kit
44Q Monotub Bulk Spawn Growing & Casing Kit is backordered and will ship as soon as it is back in stock.
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Description
Description
The 44Q Monotub Bulk Growing & Casing Kit is everything you need to take your own colonized grain spawn to a fruiting monotub: a 44-quart Grower's Select tub, 7.5 lbs of pasteurized Select Bulk Substrate, vermiculite for casing, filters, plugs, a liner and a spray bottle. Grain spawn is not included.
It is built for growers who already make their own spawn in jars or bags and are ready to scale up. Want spawn in the box? Get the Complete 44Q kit instead.
- 44QGrower's Select tub
- 7.5 lbsBulk substrate
- 1 qtVermiculite casing
- 6 + 6Filter disks + plugs
- AddColonized spawn
Why growers pick this kit
- Spawn-ready – Designed around your own fully colonized grain spawn.
- Pre-made substrate – Pasteurized, pre-hydrated Select Bulk Substrate in a single 7.5 lb bag — ready straight out of the bag.
- No drilling or measuring – Tub, filters, plugs and liner are matched and ready to go.
- Thick-walled Grower's Select tub – Our own tub, made with extra-thick walls so the bottom doesn't flex when you move it.
- Reusable – Clean the tub and reuse it for future grows.
What's in the kit
- Grower's Select 44-quart monotub (18" × 15.5" × 12")
- 7.5 lbs of pasteurized Select Bulk Substrate
- 1 quart vermiculite for the casing layer
- 6 self-adhesive monotub filter disks
- 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
You provide: fully colonized grain spawn. Make your own, or grab a Premium 5-Grain Spawn Bag or 32 oz grain jars.
How much spawn do I need?
- 1 fully colonized spawn bag
- 2 × 32 oz 5-grain or rye jars
- 3 × 24 oz 5-grain jars
- 6 × half-pint substrate jars
- Or 3–4 quarts of any colonized grain spawn
How it works
- Colonize your spawn. Prepare your grain spawn separately until it is fully colonized.
- Spawn to bulk. Fit the liner, break up the colonized grain and mix it evenly with the bulk substrate, then level the surface.
- Case. Spread the vermiculite casing layer over the surface.
- Colonize the tub. Seal the air holes with the incubation plugs and let the tub colonize at 72–76°F, undisturbed.
- Fruit. Swap the plugs for the filter disks, give the tub indirect light and mist the walls with the spray bottle.
Spawning to bulk: break up the grain and mix it through the substrate.
Step-by-step guide included. Every kit ships with our bulk growing instructions, and the full bulk monotub grow guide walks through each stage with photos.
Specifications
| Specification | Detail |
|---|---|
| Monotub | Grower's Select 44-quart, 18" × 15.5" × 12" |
| Bulk substrate | 7.5 lbs pasteurized Select Bulk Substrate (CVG) |
| Casing | 1 quart vermiculite |
| Air exchange | 6 filter disks, 6 incubation plugs |
| Liner | Black monotub liner |
| Grain spawn | Not included — 1 spawn bag or 2 × 32 oz jars recommended |
| Incubation | 72–76°F |
Need spawn too?The Complete 44Q Monotub Kit adds a sterile 5-grain spawn bag, so all you add is spores or liquid culture.
Growing in a cool room?Add a Liquid Graphite Heating Mat under the tub for gentle, even heat during colonization.
FAQ
Is grain spawn included?
No. This kit is for growers who already have colonized grain spawn or make their own. The Complete 44Q kit includes a spawn bag.
How much spawn do I need?
One fully colonized spawn bag, two 32 oz jars, three 24 oz jars, six half-pint jars, or 3–4 quarts of any colonized grain spawn.
Is the substrate ready to use?
Yes. It arrives pasteurized and hydrated to field capacity, ready to mix straight out of the bag.
When do I add the vermiculite casing layer?
Right after you mix the spawn into the substrate and level the surface, before the tub goes into colonization.
When do I swap the plugs for filter disks?
Keep the air holes plugged while the tub colonizes. Once the surface is colonized, replace the plugs with the filter disks to bring in fresh air and start fruiting.
Can I reuse the monotub?
Yes. Clean it between grows; a 44Q refill kit restocks it with spawn, substrate, filters and a liner.
