How to Start a Mushroom Farming Business in India

Start mushroom farming with oyster mushroom, run two or three crops, and only then decide whether button mushroom or a bigger shed deserves your money. Oyster grows on paddy or wheat straw at 20 to 25°C without a composting yard, so a first unit can be a 200 sq ft shed, which the government's horticulture mission costs at ₹2 lakh. Button mushroom is a different business: it needs compost, cooled rooms and a much bigger cheque, with the National Horticulture Board's model project coming to about ₹1.07 crore.

Profit depends less on yield than on two things: how many crops you fit into a year, and what the mandi pays on harvest day.

Which mushroom should you grow first: oyster, milky or button?

Choose by the temperature your shed can hold in the months you plan to sell. Oyster and milky grow on straw; button needs compost.

Figures come from an ICAR-published oyster trial, the NIOS mushroom course and a 2026 ICAR button trial; treat them as reference points.

What does mushroom farming cost, and what does a kilo actually earn?

These are cost norms from the April 2025 guidelines of the Mission for Integrated Development of Horticulture (MIDH), not supplier quotes.

What decides survival is cost per kilo. The NIOS course puts commercial button units at about ₹65 per kg, and the figure moves with biological efficiency (kilos of mushroom per 100 kg of substrate) and crops a year: six crops at 18% gives about ₹65, four crops at 17 to 18% about ₹100, six crops at 30% about ₹39. Those costs are old, so read the pattern, not the rupee figure.

Prices swing too. Banur mandi in Punjab recorded ₹98 per kg on 12 December 2025, ₹55 on 23 December and ₹77 on 13 February 2026, and Azadpur in Delhi ₹70 to ₹120 on 16 February 2026, per NaPanta's compilation of market committee data. At a ₹65 cost, a ₹77 day leaves ₹12 per kg and a ₹55 day loses ₹10. At ₹39 both days pay.

How is oyster mushroom grown, step by step?

The figures below come from an ICAR-published bag trial on Indian oyster mushroom (Pleurotus pulmonarius).

1. Chop clean, dry paddy or wheat straw and wet it thoroughly.

2. Pasteurise it. Steam-treated straw gave 98.9 kg of mushroom per 100 kg of dry straw, boiled water 91.8 and untreated straw 79.3. A hot-water soak at 70°C for an hour is the cheapest version.

3. Mix in grain spawn and fill bags. The trial used spawn at 10% of dry straw weight and 30 x 25 cm bags holding 1.5 kg of straw.

4. Keep the bags dark and closed until white mycelium covers the straw. The NIOS milky mushroom guidance says about 20 days at 25 to 35°C.

5. Open the bags at 20 to 25°C and humidity of 75 to 80%, with 8 to 12 hours of light and a water spray twice daily. The first harvest came about four weeks after spawning.

6. Pick before the caps flatten and sell the same day. In the NIOS button case, 70% went out in punnets, 25% loose and 5% as lower grade.

Button adds a composting stage: outdoor compost, indoor pasteurisation, spawn at about 0.7% of compost weight, 3.5 cm of casing soil, then cropping at 14 to 18°C.

What rooms and equipment does a mushroom unit need?

Oyster needs far less than button. Room sizes come from the NHB button model; get three supplier quotes for prices.

Spawn is the one input you do not make. ICAR-DMR Solan supplies it on advance booking, per ThePrint in January 2026. Ask for the preparation date before you order.

Is mushroom farming risky? Where units lose money

Yes, but the risks are specific, and most can be checked before you build.

• Green mould. Trichoderma is the main contaminant in oyster crops, and an ICAR-published study notes losses up to 70%. In its trial, deliberately infected beds gave 200.5 g per kg of dry straw against 782.5 g from clean beds. Pasteurise properly and wash rooms between crops.

• Price slumps. The NIOS course notes winter prices are the lowest. ICAR-DMR's February 2025 rate list shows dried oyster at ₹1,000 per kg and pickle at ₹260, its own selling rates. Our vegetable dehydration guide covers drying, and a small cold storage room helps you hold a day's pick.

• Distance to inputs. ThePrint reports that Himachal growers bring raw material from other states, adding around 30% to cost.

• A crowded market. Output rose from 177,850 tonnes in FY21 to 319,030 tonnes in FY25, per IBEF data reported by FreshPlaza. Count the growers already supplying your mandi.

Which training and subsidy can you use before you build?

ICAR-DMR Solan lists a five-day course for small and marginal farmers at ₹7,500 and a nine-day entrepreneur course at ₹15,000, plus a three-day spawn course at ₹3,000. ThePrint's January 2026 report confirms the first two fees and about 12 programmes a year. Only Indian citizens with ID proof can apply.

For money, go through your state horticulture department, which implements the MIDH assistance above and can sanction mushroom projects up to ₹20 lakh. Larger units are credit-linked, so a bank loan comes first, and the bank will want a detailed project report with room size, crop cycles, cost per kilo and price assumptions. Uttar Pradesh and Odisha also run their own programmes, so ask the district office before you build. Our MSME schemes guide covers wider support.

What to do before you invest a rupee

1. Book the five-day ICAR-DMR course, or the nearest equivalent.

2. Log your intended room's temperature morning and evening for a week; it tells you which mushroom suits it.

3. Run 20 to 30 oyster trial bags. Record straw, spawn, days to harvest and kilos, then work out your own cost per kilo.

4. Talk to mandi buyers, and after two clean crops take your data to the district horticulture office and a bank.

Mushrooms sit with other agriculture-based business ideas that start small. The greenhouse farming guide and vermicompost guide cover neighbouring options, and other low-investment business ideas are worth comparing.

Frequently asked questions about mushroom farming

Which mushroom sells for ₹1 lakh per kg?

Cordyceps militaris. Onmanorama reported in October 2026 prices up to ₹4 lakh per kg, but a jar yields only about 4 g dried, and ICAR-DMR researchers find it viable only for medium and larger units. A first farm should not be built on it.

How much does spawn cost, and how much mushroom does 1 kg give?

Spawn has no single price. It varies by species, strain and supplier, so get three written quotes. In the ICAR oyster trial, 1 kg of spawn treated 10 kg of dry straw and gives about 6.6 to 10 kg of mushroom. Button uses about 0.7%, so 1 kg covers roughly 143 kg of compost and gives 21 to 36 kg.

Can I grow button mushroom in the plains?

Only with cooling. Cropping runs at 14 to 18°C, so plains growers either crop in winter or invest in cooled rooms, a bigger commitment than oyster or milky need. Start with oyster.

How much space does a small mushroom unit need?

The MIDH small-unit norm is 200 sq ft costing ₹2 lakh, with up to five units per beneficiary eligible for 50% assistance. The NHB button model has 8,640 sq ft of growing rooms alone.