Button Mushroom Farming in India (2026) — Setup, Cycle, Yield & Profit
The complete commercial method for button mushroom (Agaricus bisporus) in India — compost phases, climate windows, realistic yield per tonne, capital cost, margin per kilogram and the mistakes that cost farms a full flush.
What Is Button Mushroom Farming and What Does It Return?
Button mushroom farming grows Agaricus bisporus on pasteurised wheat-straw compost inside an insulated PUF room held at 22–24 °C for spawn run and 16–18 °C for cropping. First harvest comes about 30–37 days after spawning, and a crop occupies the room for 60 days over three flushes, giving 200 kg of mushroom per tonne of compost. One 18×40 ft room takes 1,600 bags (16 tonnes of compost) and yields 3,200 kg a crop, 6 crops a year, at ₹94.4/kg on bought-in compost (₹73.6/kg with your own) against the model's ₹120/kg farm-gate price. The room costs ₹11.7 lakh ex-GST in the full scope; GST @ 18% and transport are extra.
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The Button Mushroom Cycle, Stage by Stage
Phase-I composting
Wheat straw, chicken manure, gypsum and urea fermented in aerated bunkers, turned on Day 3, 5 and 7; core 70–78 °C. The whole compost cycle is 15–16 days from pre-wetting to spawning.
Phase-II pasteurisation
Tunnel pasteurisation at 58–60 °C (hold 6–8 hours), then conditioning at 45–50 °C until free ammonia is under 10 ppm.
Spawning & spawn run
Grain spawn at 0.5–0.75% of wet compost; air 22–24 °C, compost 24–25 °C, RH 90–95%, CO₂ allowed to build to 5,000–15,000 ppm.
Casing & case run
4–5 cm of pasteurised casing (coco peat with FYM or spent compost plus lime, pH 7.5–7.8); case run at 24–25 °C, RH 92–95%, CO₂ 5,000–10,000 ppm.
Airing & pinning
Air brought down to 17–18 °C (ramp over 24–48 hours), CO₂ pulled under 1,000 ppm with fresh air, RH 88–92%.
Cropping (3 flushes)
16–18 °C, RH 85–90%, CO₂ under 1,000 ppm. First harvest 18–21 days after casing, then a flush every 7–10 days, split about 50% / 30% / 20%. Pick closed caps before the veil breaks.
Cook-out & reset
Cook-out at 65–70 °C for 8–12 hours before emptying, then wash and reset. The room turns over every 60 days — 6 crops a year.
Compost tunnel sizing and rack geometry behind these numbers are published on our engineering data pages.
Yield & Economics (One 18×40 ft Room, 7-Tier)
| Parameter | Indicative value |
|---|---|
| Compost filled per crop | 1,600 bags × 10 kg = 16 tonnes |
| Yield per tonne of compost (3 flushes) | 200 kg (2 kg per 10 kg bag) |
| Production per crop | 3,200 kg fresh mushroom |
| Crops per year | 6 (60 days each) — 19,200 kg a year |
| Farm-gate price in the model | ₹120/kg |
| Production cost | ₹94.4/kg on bought-in compost, ₹73.6/kg with your own compost |
| Setup cost, one room | ₹11.7 lakh ex-GST (full scope incl. 7-tier racks); ₹13.8 lakh incl. GST |
| Indicative payback | About 34 months on bought-in compost, measured on the full scope incl. GST |
Model figures for one room; actual results vary with compost quality, power tariff, labour rate and sales channel. GST @ 18% and transport are extra on all project pricing; civil works and boundary are client scope. Get a room-wise figure from the instant quotation tool.
Equipment & Where to Buy It
Climate machines (Daikin / Carrier)
Room-matched refrigeration for 16-18°C cropping
PUF panels & doors
PPGL 60/80 mm walls, 80/110 mm roof, per sq m rates
MS growing racks
7-tier, yield per sq ft depends on this
Humidifier, blower & sensors
RH 85–90% and CO₂ under 1,000 ppm while cropping
Compost unit setup
Phase-I & Phase-II tunnels in-house
Full turnkey farm
Design, supply, install, commission and train
Five Mistakes That Cost a Flush
Buying compost without ammonia testing
Spawn only into compost with free ammonia under 10 ppm; residual ammonia kills spawn. Always check before spawning.
Undersized fresh-air system
Pins set only when CO₂ is pulled under 1,000 ppm. Blower capacity and duct sizing must be calculated, not copied.
Thin insulation
Thinner than 80 mm PUF on external walls, 60 mm on common walls and 80/110 mm on the roof, the refrigeration unit runs continuously in summer and power cost destroys margin.
No cook-out between batches
Skipping the 65–70 °C cook-out carries mites, cobweb and green mould into the next crop.
Selling only to the mandi
Mandi is the price floor. Hotels, retail chains and D2C punnets pay above it — check today's rates before you plan the sales mix.
Related Reading
Frequently Asked Questions
Why Choose MushroomWale
- 01
Engineering Expertise
Agrimotion Engineering Private Limited is a registered EPC company (CIN U43900UP2023PTC185328, GSTIN 09AAZCA0158R1ZP) based in Firozabad, Uttar Pradesh.
- 02
Proven Track Record
Turnkey mushroom projects from a 2-room starter to a 20-room commercial farm.
- 03
Bank-Recognized DPRs
Bank-format DPRs prepared to NABARD, NHB and MIDH norms for loan and subsidy applications.
Build a Button Mushroom Farm That Runs Year-Round
Free room-wise quotation within 24 hours — growing rooms, compost unit or full turnkey.
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