ROCKY MOUNTAIN MUSHROOM FARM
Ready-to-fruit grow blocks for commercial specialty-mushroom farms. Blue oyster first, then lion's mane and shiitake. In development in Colorado.
Est. 2025 · Colorado & the Mountain West
You already know where the hours go: cleaning, mixing, cooking, cooling, inoculating, incubating, cleaning again.
When Cornell surveyed 139 specialty growers, the top three barriers to growing the business were labor, production facilities, and growing output to meet demand.1
The ceiling isn't sales, and it's not know-how. It's the hours and the square footage that go into making blocks. Cornell costed five indoor farms and found the same thing in the accounts: on the farms making their own blocks, 80% of what they spent went to labor and 20% to materials. On the farms buying blocks ready to fruit, labor dropped to 42%.2
That's the part I'm aiming to build around.
A ready-to-fruit block you buy instead of make. Prep hours go back into growing and selling. Prep space becomes fruiting space.
The target is to cost less than making your own once your own hours are in the number. That qualifier is the whole claim, and I won't put a figure on it until the bench work says what the figure is.
To be clear about what I want and what I don't: the part I'd take off your plate is the part that gets cheaper the bigger it gets, which is making the block. Fruiting, packing and selling are local problems, and they stay yours.
Right now I'm finishing development testing, building the first prototypes of the machinery, working through National Science Foundation funding, and talking to growers so that what gets built is grounded in what the industry actually needs rather than in what I assume it needs.
Three things at once.
A patent-pending method that redesigns how a block gets made. I got into the microbiology side of this early and never really got back out - specifically mycelial enzymatic expression, which is a fancy way of saying the fungus already does a lot of the work itself if you set things up right, so a farm ends up paying in labor and process time for what the biology would do on its own. I spent about five years chasing that, and somewhere in there it turned into a plan that runs 470 pages with more than 500 sources behind it. The method that came out of it is patent pending, filed July 2026. I'm finishing up development tests now to pin down what the yield and the cost actually are, because I'd rather hand you a real number than a hopeful one.
Custom machinery. Several steps in substrate prep have no good equipment behind them, so they get done by hand. My work before this was contamination control in aerospace, on hypergolic propulsion systems, where a process that isn't clean enough doesn't fail politely. I'm using that background to design machinery that is cheap to build, keeps contamination out, and scales. Those machines are designed, and some of them are already prototyped.
Scale. Making blocks a thousand at a time costs less per block than making them a hundred at a time. Most farms that make their own are working a batch at a time, on equipment sized for a batch.2
Not this year. Bench work finishes first, then trials. The survey is how you get into the first round of those.
Blue oyster first, then lion's mane and shiitake — the sawdust-block species. Which one moves fastest after oyster depends partly on what growers tell me.
That's the honest objection, and it's the one I take most seriously - most people who buy blocks are buying them on the way to making their own. A brewery doesn't malt its own barley though, and a bakery doesn't mill its own flour. Buying an input stops being a beginner move at the point where the person making it is doing something you can't do as cheaply in your own building. That's the whole bet, and it's a fair thing to hold me to.
Joey Hammond, in Colorado. Rocky Mountain Mushroom Farm LLC is a Colorado company, formed 2025. More about me and how this started →
About 3 minutes for the part I actually need, mostly taps: what you run, what it costs you now, and what breaks. I read every response myself, and the growers who answer it are the ones I'll come to first when there are trial blocks to give away.
Or just email me: hello@rockymountainmushroomfarm.com
blocks on site at about 20% materials and 80% labor, while ready to fruit block farms have a higher material cost at 58% and labor being 42%.The five farms ran 16, 24, 90, 117 and 313 blocks a week. Verified 2026-08-02.
There is typically an 8–12 week window between buying the blocks and being paid for the mushrooms.Verified 2026-07-31.
Claims on this page with no marker, and why: the ~470-page plan / 500+ sources and the July 2026 provisional are RMMF's own records, checkable on request but not published. “About five years of testing” and the aerospace background rest on my own account (owner decisions D1 and D2). The machinery is described as designed-and-partly-prototyped, which is the current state, not a claim about performance. There is no yield, contamination or price number anywhere on this page, deliberately, because the bench campaign has not produced one yet.