Button Mushroom Cropping Cycle & Yield per Room
Button mushroom cropping cycle day-by-day: flush timing, yield per bag and per room, cycles per year and labour planning for commercial farms.
How long is the button mushroom cropping cycle?
A commercial button mushroom room runs an approximately 45-day cycle from filling to emptying: spawn run, casing, case run, pinning, then two to three flushes about 7–10 days apart. With turnaround and disinfection, a well-run room completes 6–7 cycles per year.
Estimate your own numbers
Pick a room size and count — the tool applies the same engineering constants used in MushroomWale BOQs and returns a recommended plan summary.
Total built-up area
~1,440 sq ft
720 sq ft per room
Cooling requirement
~16 TR
8 TR per room
Bag capacity
~3,200 bags
1,600 bags per room
Phase-III compost
~80–96 T
per full filling (25–30 kg/bag)
MS racking material
~4,100 kg angle
+ ~450 kg jali (incl. wastage)
PUF doors
2 nos.
insulated cold-room doors
Yield per cycle
~6,400 kg
~106 kg/day at peak flush
Annual yield @ 5 cycles
~32,000 kg
fresh weight, all flushes
Recommended plan summary
Climate unit per room: Daikin 8 TR (~28 kW Outdoor Unit)
2× Outdoor Unit (4 HP ea., R32 3ph HMT) + 1× Indoor Unit (HMT Dual-Circuit Evap, 550mm fan)
Compost planning: ~80–96 tonnes of Phase-III compost per filling, staggered across rooms so tunnel turns stay continuous.
Indicative engineering estimate only — not a price quotation. Final sizing depends on site conditions, climate zone, ceiling height and grower practice. GST and transportation are extra; any additional client requirement is charged extra.
How MushroomWale calculates it
- 1
Plan the room calendar in cycles, not months
One room = one 45-day cycle plus turnaround. Annual output is cycles per year × yield per cycle, so every day lost to slow turnaround is a direct output loss.
- 2
Stagger rooms so labour and sales are level
Filling all rooms together produces a harvest spike no market or picking crew can absorb. Offset room fillings so picking, packing and dispatch are steady across the week.
- 3
Budget yield per bag, then per room
MushroomWale plans on about 2 kg of button mushrooms per bag across the cycle, which gives roughly 2,000 kg for an 18×30 ft room and 6,000 kg for an 18×70 ft room per cycle.
- 4
Size labour against flush days, not average days
Picking demand is concentrated in flush windows. Crew sizing follows the peak flush day of the staggered calendar; the rest of the cycle needs far fewer hands.
- 5
Protect the turnaround
Cook-out, cleaning and disinfection between cycles are what keep flush three viable across the year. Farms that shorten turnaround to squeeze in a cycle usually lose more to disease pressure than they gain.
Reference data
Indicative cycle stages (Agaricus bisporus)
| Stage | Duration | Notes |
|---|---|---|
| Filling & spawn run | ≈ 14 days | 22–25 °C, high CO₂ tolerated |
| Casing & case run | ≈ 7–8 days | 4–5 cm casing, pH 7.2–7.5 |
| Pinning | ≈ 5–7 days | Temperature and CO₂ dropped to trigger pins |
| Flush 1 → 3 | ≈ 18–21 days | Flushes roughly 7–10 days apart |
| Cook-out & turnaround | ≈ 3–5 days | Cleaning and disinfection before refilling |
Filling & spawn run
- Duration
- ≈ 14 days
- Notes
- 22–25 °C, high CO₂ tolerated
Casing & case run
- Duration
- ≈ 7–8 days
- Notes
- 4–5 cm casing, pH 7.2–7.5
Pinning
- Duration
- ≈ 5–7 days
- Notes
- Temperature and CO₂ dropped to trigger pins
Flush 1 → 3
- Duration
- ≈ 18–21 days
- Notes
- Flushes roughly 7–10 days apart
Cook-out & turnaround
- Duration
- ≈ 3–5 days
- Notes
- Cleaning and disinfection before refilling
Planned yield per room per cycle
| Room | Bags | Yield per cycle | Indicative daily harvest |
|---|---|---|---|
| 18×30 ft | 1,000 | 2,000 kg | ≈ 33 kg/day |
| 18×40 ft | 1,600 | 3,200 kg | ≈ 53 kg/day |
| 18×60 ft | 2,500 | 5,000 kg | ≈ 83 kg/day |
| 18×70 ft | 3,000 | 6,000 kg | ≈ 100 kg/day |
18×30 ft
- Bags
- 1,000
- Yield per cycle
- 2,000 kg
- Indicative daily harvest
- ≈ 33 kg/day
18×40 ft
- Bags
- 1,600
- Yield per cycle
- 3,200 kg
- Indicative daily harvest
- ≈ 53 kg/day
18×60 ft
- Bags
- 2,500
- Yield per cycle
- 5,000 kg
- Indicative daily harvest
- ≈ 83 kg/day
18×70 ft
- Bags
- 3,000
- Yield per cycle
- 6,000 kg
- Indicative daily harvest
- ≈ 100 kg/day
- Yields are planning figures for climate-controlled rooms with good Phase-III compost; actual output depends on compost quality, casing, operator discipline and strain.
- Cycle timelines for the compost unit run separately from the grow-room calendar and must be planned together.
Frequently asked questions
Related engineering pages
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