Monotub — The serious-yield setup
A large tub of bulk substrate colonized by grain spawn. The best yield-per-effort ratio in home cultivation — once you've got the basics down.
About this method
The monotub is the workhorse of home cultivation: mix colonized grain spawn into a bulk substrate (coco coir, vermiculite, gypsum) inside a modified storage tub, and let it do its thing.
You can buy ready-colonised grain spawn (the easier route) or make your own from rye grain and a spore syringe, which is cheaper at scale but needs a pressure cooker.
Bigger substrate means bigger flushes, but also bigger contamination stakes — this method rewards people who have grown before.
The process at a glance
- Prepare the tubDrill air holes, add liner, cover holes with micropore tape.
- Prepare bulk substrateHydrate coco coir + vermiculite to field capacity (pasteurized).
- Spawn to bulkMix grain spawn evenly through the substrate; level the surface.
- ColonizeLid on, hands off, ~1–3 weeks at 21–24°C until the surface is white.
- Fruit & harvestIntroduce fresh air and light; mist walls; harvest flush after flush at veil tear.
Everything you might need
Affiliate links — the same products the guided flow recommends. Not sure what applies to you? Let the wizard build your exact list.
Not sure which of these you need?
Answer a few questions and get the exact list for your situation, minus the gear you already own.
Build my exact list ✨