Mycro tracks every batch from spawn to final flush — so you catch contamination early, stop guessing your yields, and finally know your real cost and profit per block.
No login, no install — your batches save right in your browser. Oyster, lion's mane, shiitake, king trumpet & more. Built for legal culinary & medicinal growers.
Mycro is free grow-operations software for small gourmet and functional mushroom farms. It tracks every batch from spawn to final flush, working out biological efficiency, contamination rate and cost per pound automatically, and traces any block back through grain spawn, liquid culture and petri dish to the source it came from. It runs in a browser with no account.
Field-crop software models beds and rows. Mushroom farming is indoor, biological, batch-based manufacturing — and the things that decide whether you make money are different.
Track each batch through inoculate → colonize → fruit → harvest. See exactly where everything stands today.
Log contamination by step, strain, and substrate. Spot the pattern that's quietly eating 15% of your blocks — and fix the root cause.
Real BE per strain and substrate, flush by flush. Know which projects actually pay and which just look busy.
True cost per block and per pound — substrate, spawn, bags, labor, energy. Quote restaurants with confidence, not vibes.
Colonization and fruiting timelines turn into a schedule, so you know what's coming ready and never miss a flush.
Standing restaurant & market orders, pack lists, and simple invoices — match production to demand.
Genuinely useful, no email required — a taste of how Mycro thinks about your grow. Use them, share them, bookmark them.
The actual batch tracker — not just a calculator. Add a batch, advance it through each stage, and get biological efficiency, days-in-stage and your contamination rate automatically. Comes preloaded with sample batches; saves on your device.
Everything above the block: source → petri dish → liquid culture → grain spawn. Each culture takes a tracking code from its parent, so flagging one contaminated plate lists every jar, bag and batch that came off it. Shares one record with the grow log, so a block traces back to the plate and the supplier.
Substrate hydration, spawn ratio, expected yield, and full cost-and-profit per block — the math you currently do by hand.
Scale a Masters Mix or supplemented-sawdust recipe to any batch: exact sawdust, soy hull, bran, gypsum & water to field capacity.
Temperature, humidity, CO₂, fresh air & light for 14 gourmet & medicinal species — searchable, filterable, °C/°F.
Grower guides: Oyster mushroom growing (complete guide) · Lion's mane growing (complete guide) · Shiitake growing (complete guide) · How to start a mushroom farming business · Biological Efficiency explained · How much water to add to substrate · Spawn ratio explained · Identifying & preventing contamination · Master's Mix substrate recipe · How long does it take to grow mushrooms? · How to get mushrooms to pin · see all guides →
Comparisons: Best mushroom grow log apps (2026) · Mycro vs MycoTrack · Mycro vs MycoHub · Mycro vs MycoFile · Mycro vs Kinoko
Early-access pricing — and Founding Growers ($99 once, below) lock these rates in for life.
The Grow Calculator, the species reference, and the no-login Grow Log — unlimited batches, saved in your browser. No account, no item cap. Perfect for the serious hobbyist about to go pro.
Unlimited batches, full grow log, contamination analytics, yield & BE reports, COGS & pricing, harvest calendar, CSV export.
Everything in Grower, plus wholesale order management, pack lists & labels, multi-user, and simple invoicing.
The monthly Grower and Farm plans aren't open yet — those prices are targets and may change. The one-time $99 Founding Grower spot is available today, opens a sign-in account immediately, and locks whatever those rates end up being, for life.
Mycro is grow-operations software for small gourmet and functional mushroom farms — the growers selling oyster, lion's mane and shiitake to restaurants, markets and CSAs. It runs in any web browser with nothing to install, and includes a free Grow Log plus calculators for substrate, spawn ratio, yield and cost.
Yes. Mycro's Grow Log is free with no sign-up — open usemycro.com/grow-log.html and start logging batches in your browser. It tracks each batch from inoculation through colonization, fruiting and harvest, and automatically computes biological efficiency, days-in-stage, an overdue-colonization flag and your contamination rate. It exports to CSV and JSON.
Yes. Mycro's Culture Library is free with no account at usemycro.com/culture-library.html. Traceability here means answering two questions about anything on your shelf: where did this come from, and what else came from the same place. Log a source once, add petri dishes, liquid cultures and grain spawn under it, and each takes a tracking code derived from its parent, so the code on the jar carries the lineage. Mark anything contaminated and it lists every culture, container and block descended from it, plus the parent and siblings it came from. It keeps your own records rather than acting as a certified food-safety or compliance system.
The free tools and Grow Log cost $0 with no account. A one-time $99 Founding Grower spot is available today: it opens a sign-in account straight away, so your log syncs across every device, and it locks founder pricing for life. It is refundable any time. The monthly cloud plans are not open yet — the Grower plan targets about $12/month (unlimited batches, analytics, reports) and the Farm plan about $24/month for wholesale orders, labels and multi-user.
The free tools need no account at all — the Grow Log and Culture Library run in your browser and back themselves up automatically to a private link you can open on any device. Signed-in accounts also exist and are live: sign-in is passwordless, so there is no password to pick or lose, and a signed-in log follows your email onto any device with no link to keep track of. Accounts are currently opened by the one-time $99 Founding Grower spot.
MycoFile and MycoHub are native mobile apps you install. Mycro runs in any web browser with nothing to download, its Grow Log is free with no account or item cap, and its grow-math engine is open source. Mycro is built specifically for the commercial gourmet and functional farm rather than the hobby grower.
No. Mycro is web-based — it opens in any browser on a phone, tablet or computer, with nothing to download or update. The free Grow Log works without an account, saving your batches in the browser, and it backs them up automatically to a private link you can open anywhere. A Founding Grower account replaces that link with a real sign-in, so the same log follows your email onto any device.
Biological efficiency (BE) is fresh harvest weight as a percentage of dry substrate weight — the core yield metric for mushroom farms. Mycro calculates BE automatically for every batch in the Grow Log and Grow Calculator, so you can compare strains and substrates. A typical oyster batch runs roughly 75–100% BE.
Mycro is for small commercial gourmet and functional mushroom farms — operations selling oyster, lion's mane, shiitake and similar culinary or medicinal mushrooms weekly to restaurants, farmers' markets and CSAs. It's built for the serious hobbyist going pro and the established small farm, not for psilocybin or large industrial operations.
Sign-in accounts are live, and a Founding Grower spot is what opens one. Your log stops living on a single browser: sign in on the laptop in the lab and the phone in the grow room and it's the same log, no link to keep track of.
Mycro is young and still being built, so this also buys you a say in what comes next — and it's fully refundable, any time, no reason needed.
Founder price, locked for life. Refundable any time.
🌱 1 of 10 spots claimed — the first Founding Grower is on board.
🔒 Secure checkout by Stripe. You'll get a receipt, and you can sign in with the same email straight afterwards. Not ready? Join the free list →
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Mycro is built by Sascha Heyer, working directly with the growers who use it. Every feature on this page came from a specific request by a working farm, not from a roadmap: the culture library and its contamination traceback, cost per pound by method and strain, the delivery labels, and the grain-spawn shake milestone were all asked for by name. The grow maths is open source and published on GitHub so the numbers can be checked rather than taken on trust.
If something here is wrong, or your farm needs something it does not do, write to hello@usemycro.com. A person reads it.