MycoClimate™ 66Q Automated Monotub Mushroom Grow Kit – Temperature & Fresh Air Control
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MycoClimate™ 44Q Automated Monotub Mushroom Grow Kit – Temperature & Fresh Air Control
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Complete Refill Kit for Large 66Q Monotub - Includes Grain Spawn & Bulk Substrate
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Complete Refill Kit for Medium 44Q Monotub - Includes Grain Spawn & Bulk Substrate
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Monotub Grow Kits — Complete Kits for Bigger Mushroom Harvests
A monotub grow kit is the most popular way to grow big harvests of mushrooms at home. Instead of a single jar or bag, you combine colonized grain spawn with bulk substrate inside a filtered tub — producing 1 to 4+ pounds of fresh mushrooms per grow, then flushing again and again. Midwest's monotub grow kits include everything you need except the genetics: a pre-built filtered tub (no drilling), sterilized grain spawn, and bulk substrate, matched and ready to grow.
Why Grow Mushrooms in a Monotub?
- Biggest yields: 1 to 4+ pounds of fresh mushrooms per tub — far more than an all-in-one bag or jar.
- Multiple flushes: harvest 2 to 4 times from a single setup before the substrate is spent.
- No drilling, no guesswork: the tubs arrive pre-built with the correct filtration and fresh-air exchange.
- Reusable: run grow after grow using low-cost monotub refill kits.
- Grows anywhere: a spare closet, a basement, or any room-temperature space works fine.
Choose Your Monotub Size
Every size uses the exact same simple method — bigger tubs just hold more substrate and produce a larger harvest. Pick by how much you want to grow and how much space you have.
| Tub Size | Footprint | Typical Fresh Yield* | Best For |
|---|---|---|---|
| 28Q Monotub Kit | Compact | ~1–2 lbs | Your first monotub, tight spaces, testing a species |
| 44Q Monotub Kit | Mid-size | ~2–3 lbs | The popular all-rounder — big yield, manageable footprint |
| 66Q Monotub Kit | Large | ~3–4+ lbs | Maximum harvest per grow |
| MycoClimate Automated | 44Q / 66Q | Higher & more consistent | Hands-off temperature & fresh-air control |
*Yields are approximate and vary by mushroom species, genetics, and growing conditions.
How a Monotub Grow Kit Works
- 1. Start your spawn: inoculate the grain spawn with your liquid culture or spore syringe — or start faster with pre-colonized grain spawn.
- 2. Spawn to bulk: once the spawn is colonized, mix it into the bulk substrate and load your tub.
- 3. Colonize & fruit: let the tub fully colonize, then introduce fresh air to trigger fruiting.
- 4. Harvest & repeat: pick your first flush in about 5 to 8 weeks, then mist and repeat for 2 to 4 flushes total.
Full walkthrough: read the step-by-step monotub grow guide.
Stepping Up from PF Tek Jars?
A monotub is the natural next step after PF Tek. Once your colonized jar cakes are ready, birth them into a tub with bulk substrate and you'll multiply the harvest from the very same grow. Our Mega Mushroom Kit — Monotub Edition is built for exactly this: start with foolproof jars, then convert to a monotub without buying anything extra.
Frequently Asked Questions About Monotub Grow Kits
What is a monotub grow kit?
A monotub grow kit is a complete bulk-growing setup: a filtered plastic tub, sterilized grain spawn, and bulk substrate. You combine the spawn and substrate inside the tub to grow large flushes of mushrooms — typically 1 to 4+ pounds per grow, with multiple flushes from a single setup.
What size monotub should I choose — 28Q, 44Q, or 66Q?
Pick your size by how much you want to harvest and how much space you have. A 28Q is ideal for your first tub or a tight space, a 44Q is the popular all-rounder, and a 66Q produces the biggest harvests per grow. All sizes use the same simple method — bigger tubs just hold more substrate and yield more.
How much can I harvest from a monotub?
Most monotubs produce 1 to 4+ pounds of fresh mushrooms in the first flush, then keep fruiting for 2 to 4 flushes total before the substrate is spent. Exact yields depend on the tub size, the species, and your growing conditions.
Do I need to drill holes in the tub?
No. Midwest's monotubs arrive pre-built with the correct filtration and fresh-air exchange already in place — no drilling and no guesswork. You just add spawn and substrate and grow.
Do I need spores or a liquid culture?
Yes — monotub grow kits include the tub, spawn, and substrate, but the genetics are sold separately so you can choose your species. Add a liquid culture or spore syringe, or start faster with pre-colonized grain spawn.
Can I reuse a monotub kit?
Yes. The tub is reusable indefinitely — for your next grow, just add a low-cost monotub refill kit (fresh spawn and substrate sized to your tub) instead of buying a whole new kit.
Can I convert a PF Tek or jar grow into a monotub?
Absolutely — it's a natural next step. Once your PF Tek jars are fully colonized, birth the cakes into a monotub with bulk substrate to multiply your harvest. Our Mega Mushroom Kit (Monotub Edition) is designed to do both in one kit.