A Pune capsicum farmer who switched 1 acre from open field to a naturally-ventilated polyhouse (NVPH) saw production jump from 25 tonnes to 92 tonnes per acre per year. But she wrote a ₹34 lakh cheque to get there. A Hosur farmer running shade net on 1 acre spent ₹8.5 lakh and tripled his tomato yield. A hi-tech fan-pad gerbera grower in Pune invested ₹46 lakh and cleared ₹14 lakh/year on a single acre. The right structure depends not on subsidy maxima but on the crop you are growing. MIDH and state H'ti boards together cover 50% (general) to 95% (some tribal/state-add) of capex — the structure choice is the decision that compounds across the next 8 years.
1. The four real options on the menu
Indian protected cultivation has converged on four structure classes after two decades of MIDH-backed experimentation.
| Structure | Capex/acre | Lifespan | Best crops |
|---|---|---|---|
| Open field | ₹0 | — | Pulses, cereals, oilseeds |
| Shade net (50–75%) | ₹6–10 L | 5–7 yr | Leafy veg, ginger, turmeric |
| NVPH polyhouse | ₹32–38 L | 8–10 yr | Capsicum, tomato, cucumber |
| Fan-pad hi-tech | ₹35–50 L | 10–12 yr | Dutch rose, gerbera, anthurium |
| Walking tunnel | ₹3–5 L | 3–4 yr | Strawberry, salad veg seasonal |
2. The MIDH subsidy stack — what you actually get
MIDH operational guidelines (revised 2024) set the standard assistance pattern:
- NVPH polyhouse — 50% of indicative cost for general states; 60% for NE/Hill/Tribal areas.
- Shade net — 50% of indicative cost (₹6.5L/1,000 sqm cap).
- Walking tunnel — 50% of ₹600/sqm.
- Plus PMKSY-PDMC drip system covers up to 55% for SMF farmers.
Some states top up further. Maharashtra's Mahatma Phule Krishi Vidyapeeth-tied schemes push effective NVPH support to 65-75% for SC/ST and women farmers. Karnataka's state H'ti board adds 15-20% on its own.
3. Per-acre economics for the three winners
3.1 Coloured capsicum in NVPH
The single most analysed protected-cultivation case in India.
| Item | Open field | NVPH |
|---|---|---|
| Capex/acre | ₹0 | ₹34 L |
| Capex after MIDH 50% | ₹0 | ₹17 L |
| Yield/acre/yr | 25 t | 90 t |
| Avg realisation | ₹35/kg | ₹85/kg |
| Gross revenue | ₹8.75 L | ₹76.5 L |
| Variable cost | ₹2.5 L | ₹14 L |
| Net before depreciation | ₹6.25 L | ₹62.5 L |
| Depreciation (10 yr str line) | — | ₹1.7 L |
| Net post-depreciation | ₹6.25 L | ₹60.8 L |
| Payback (with subsidy) | — | ~3.4 yr |
3.2 Dutch rose in fan-pad hi-tech
Premium cut-flower farms in Pune-Talegaon and Hosur converged on fan-pad climate-controlled houses for Dutch rose.
Capex/acre ₹46 L
After MIDH 50% ₹23 L
Stems/year 6.5–8 lakh
Realisation ₹3.5–6/stem
Gross revenue ₹28–40 L
Variable cost (incl power) ₹14–18 L
Net ₹14–22 L
Payback (with subsidy) ~3–4 yr3.3 Leafy greens in 50% shade net
Lowest capex bracket. Often the right answer for a first-time protected-cultivation farmer.
Capex/acre ₹8.5 L
After MIDH 50% ₹4.25 L
Yield (palak, methi, coriander) 35–50 t/yr
Realisation ₹25–40/kg
Gross revenue ₹10–20 L
Variable cost ₹4–7 L
Net ₹6–13 L
Payback (with subsidy) 1.5–2 yr4. The decision flowchart
We coded the following heuristic from interviews with 14 farmers across MH, KA, HR and PB:
If crop wholesale price < ₹30/kg → Open field
If pest pressure is the main constraint → Shade net
If crop price ₹50–150/kg + storage life
needs controlled environment → NVPH polyhouse
If crop is cut-flower or premium herbs
with year-round price > ₹250/kg → Fan-pad hi-tech5. Risks each structure ignores in the brochure
5.1 Film replacement cycles
Polyhouse UV-stabilised film lasts 3-4 years in north-Indian climates and 2.5-3 years in Konkan/Goa coastal humidity. A full re-film on 1 acre costs ₹2.8-3.5 lakh — budget it.
5.2 Power for fan-pad
Fan-pad climate control draws 4-6 kW per 1,000 sqm canopy. In states with patchy 3-phase supply (UP, MP, BR), unbudgeted diesel-genset hours can erode 20-30% of net margin.
5.3 Monoculture pest pressure
Locked structures concentrate thrips, whitefly, and powdery-mildew populations. Year 3-4 yields can drop 18-25% if integrated pest management (IPM) discipline slips.
5.4 Mandi vs hotel realisation
The ₹85/kg coloured capsicum price assumes HoReCa or quick-commerce sale. Mandi realisation drops to ₹35-50/kg — cutting NVPH economics in half. Have your channel locked before commissioning.
6. Layered scheme stack
Beyond MIDH, two more layers compound the economics:
- PMKSY-PDMC drip system — 55% subsidy on the drip+fertigation skid (~₹85,000 saving per acre).
- AIF interest subvention — 3% on the bank-loan portion up to ₹2 cr (₹60,000-₹1.2L/yr saving on a ₹15-20L loan).
- NHB capital investment subsidy — 50% (back-ended) of project cost up to ₹56 lakh per project.
7. Vendor benchmarks
Agriplast (Bengaluru) and Rivulis India dominate the NVPH structure market; Netafim India is the gold standard for fertigation skids; Premier Polyfilm and Plastene India lead UV-stabilised polyfilm. Get three quotes and walk a reference site before signing — structure quality drift between vendors is real, and the warranty terms (10 yr structure, 3 yr film) are not negotiable.
8. Bottom line
Open field works fine for staples; do not overengineer. Shade net is the right answer for leafy and short-cycle veg with ₹4-8 lakh per acre at risk and 1.5-2 year payback. NVPH is the right answer for capsicum, cucumber, tomato when MIDH subsidy is sanctioned and HoReCa offtake is locked. Fan-pad hi-tech is for cut-flowers and exotic herbs where ₹250+/kg realisation justifies the climate-control burden. The structure decision is the most important capex call you will make in the next decade — sleep on it.