Free Cultivation Tools
Every calculation
a small mushroom
farm needs.
Spawn rate, CVG ratio, hydration, and F0 sterilization. Free. No signup. No spreadsheet. No login.
Right amount of spawn for any block
Spawn Rate
Grain-to-substrate ratio at any block size. Pick a percentage, get the spawn weight.
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Bulk substrate mix planner
CVG Ratio
Coir, vermiculite, gypsum — the most reliable bulk substrate recipe in mushroom cultivation.
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Hit field capacity, every time
Hydration
Field-capacity water-to-dry-substrate ratios for coir, hardwood, straw, and Masters Mix.
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Lab-grade sterilization holds
Kineticist (F₀)
Altitude-aware sterilization hold calculator with thermal-curve modeling and material-dependent lethality.
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Track your grows with these calculations built in.
Cynic & Spore is the verified mushroom grower platform. Every batch you log becomes a chain-of-custody record — and feeds a branded storefront URL chefs can scan to verify what you ship. Free 14-day Pro trial. No credit card.