Mushroom Compost Preparation
Compost quality = mushroom quality. Master the Phase-I & Phase-II process — the single largest factor in your yield.
How to Prepare Mushroom Compost?
Mushroom compost preparation has two phases: Phase-I (Day 0–9, on the slab and in aerated bunkers) uses wheat straw (1,000 kg) + chicken manure (600-700 kg) + urea + gypsum with a core of 70-78°C. Phase-II (Day 9–15, in a sealed tunnel) heats to 58-60°C for 6-8 hours, then conditions at 45-50°C for 4-6 days; the whole cycle is 15–16 days from pre-wetting to spawning. Good compost is dark brown, earthy-smelling, pH 7.0-7.5, moisture 66-70%. Self-made compost costs ₹8,400-9,700 a ton on the site's cost model, against ₹12,300-14,300 bought in.
Phase-I Compost Formula
Standard recipe for 1 ton of wet compost. Source: ICAR-DMR Solan.
| Ingredient | Quantity | Purpose |
|---|---|---|
| Wheat Straw | 1,000 kg | Carbon source (base substrate) |
| Chicken Manure | 600-700 kg | Nitrogen source (N:C ratio balancing) |
| Urea | 10-12 kg | Additional nitrogen supplementation |
| Gypsum | 30-40 kg | pH buffering, structure improvement |
| Water | 3,000-3,500 L | Moisture (68-72% final) |
Phase-I Schedule (Day 0–9)
Wet the straw on the slab to about 70% moisture; mix in manure and bran
AmbientTurn the pre-wet mix; add urea; re-wet dry patches
45-55°CFill bunker 1; forced air from the spigot floor starts
55-65°CTurn into bunker 2; add gypsum; check the squeeze test
Core 70-78°CTurn again; moisture 68-72%; break clumps
Core 70-78°CPhase-I done — dark brown, pliable straw; fill the Phase-II tunnel
Core 70-78°CPhase-II Pasteurization (Day 9–16)
Loading
Fill pasteurization tunnel/room with Phase-I compost on shelves or trays. Ensure uniform depth of 1.8-2.0 m.
Levelling Off
Raise temperature to 58-60°C using steam injection. Hold for 6-8 hours. Kills pathogens, nematodes, and weed seeds.
Conditioning
Reduce to 45-50°C and hold for 4-6 days with fresh air. Beneficial thermophilic microorganisms convert ammonia to protein.
Cool-Down
Gradually cool to 25°C over 12-24 hours with fresh air. Compost is ready for spawning when free ammonia is under 10 ppm and moisture is 66-70%.
For tunnel specifications, see our Phase-2 Tunnel Service page.
Quality Check Parameters
| Parameter | Good | Problem |
|---|---|---|
| Color | Dark chocolate brown | Black (over-composted) or yellow (under-composted) |
| Smell | Earthy, slightly sweet | Ammonia (>10 ppm = not ready) |
| Moisture | 68-72% (squeeze test: 2-3 drops) | Dripping wet (>75%) or dry & crumbly (<65%) |
| pH | 7.0-7.5 | Below 6.5 or above 8.0 |
| Nitrogen | 1.8-2.2% | Below 1.5% (poor yield) or above 2.5% (green mould risk) |
| Structure | Short fibres, no straw visible | Long unbroken straw (under-composted) |
Buy vs. Self-Compost
| Factor | Buy Ready-Made | Self-Compost |
|---|---|---|
| Initial Investment | ₹0 (pay per batch) | ₹6.5 lakh (20 T) or ₹7.1 lakh (30 T) of equipment ex-GST, plus ₹8-10 / 12-14 lakh of civil work in your scope |
| Cost per Ton | ₹12,300-14,300 | ₹8,400-9,700 |
| Quality Control | Dependent on supplier | Full control |
| Minimum Scale | Any (1 room+) | 4+ rooms (to justify investment) |
| Payback | N/A | about 12-14 months feeding four 18×40 ft rooms, 10-11 months at five, from the saving |
Related Guides & Resources
Complete Farming Guide
Full overview from beginner to commercial
Button Mushroom
Compost-based Agaricus cultivation
Compost Unit Solutions
20-ton & 30-ton composting infrastructure
Phase-1 Compost Service
Outdoor composting yard setup
Phase-2 Tunnel Service
Pasteurization tunnel construction
Cost Breakdown
Complete setup costs
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.
Need a Composting Setup?
MushroomWale builds 20-ton and 30-ton composting tunnels with Phase-II infrastructure.
- Turnkey farms built
- Pan-India delivery
- Bank-ready DPR