What is a Polyhouse? Complete Guide to Polyhouse Farming in India.
If you've ever driven past a large structure covered in white or green plastic sheeting on farmland, you've seen a polyhouse. But what exactly is it — and why are farmers across India increasingly choosing it over open-field cultivation?
This guide covers everything: what a polyhouse is, how it works, what you can grow in it, what it costs, and how government subsidies make it accessible for Indian farmers.
What is a Polyhouse?
A polyhouse (also called a polytunnel or plastic greenhouse) is a structure made of a metal or bamboo frame covered with UV-stabilized polyethylene film. It creates a controlled microclimate inside — regulating temperature, humidity, and light — so crops grow faster, yield more, and face fewer pest and disease problems than in open fields.
Unlike a glass greenhouse, a polyhouse is far more affordable to build and maintain, which makes it the go-to choice for commercial farming in India.
How Does a Polyhouse Work?
The poly film traps solar radiation and warms the air inside during cooler months. In summer, ventilation systems — side walls with insect nets, rollup curtains, and sometimes fan-pad cooling — bring the temperature down to a crop-safe range.
Key systems inside a polyhouse:
Ventilation — insect net side walls + ridge vents keep airflow steady without letting pests in
Irrigation — drip or fogger systems deliver water directly to roots, reducing wastage by up to 60%
Growing medium — soil beds, grow bags (cocopeat), or hydroponic trays depending on the crop
Shading — shade nets are sometimes added inside for shade-loving crops
Types of Polyhouses in India
Type | Best For | Cost Range |
Low-cost (bamboo/GI) | Small farmers, trials | ₹5–10 lakh/acre |
Semi-climate controlled | Most commercial crops | ₹15–25 lakh/acre |
Fan & Pad (climate controlled) | High-value crops, year-round | ₹30–50 lakh/acre |
Naturally Ventilated (NVP) | Most popular in India | ₹20–35 lakh/acre |
AgriJoy sets up Naturally Ventilated Polyhouses (NVPs) across its 40+ farms in India — the sweet spot of cost, yield, and low maintenance for Indian climatic conditions.
What Can You Grow in a Polyhouse?
Polyhouses unlock crops that simply don't survive or produce economically in open fields in most Indian states:
Vegetables: Capsicum (bell pepper), tomato, cucumber, lettuce, broccoli, baby corn
Flowers: Gerbera, rose, carnation, chrysanthemum — high-value floriculture for export markets
Herbs: Basil, stevia, mint, parsley — premium pricing, short cycles
Exotic & off-season crops: Cherry tomatoes, colored capsicum, microgreens
The biggest commercial win: colored capsicum (yellow, red, orange) fetches ₹80–150/kg in Indian supermarkets and hotels — versus ₹10–20/kg for open-field crops. Farmers running polyhouses on even 1 acre regularly see 5–8x revenue over traditional farming on the same land.
Polyhouse vs Open Field: What's the Real Difference?
Factor | Open Field | Polyhouse |
Yield | Baseline | 3–5x higher |
Water use | High | 50–60% less |
Pest pressure | High | Very low |
Seasonality | Restricted | Year-round |
Labour | High | Moderate |
ROI timeline | Slow | 2–4 years |
Government Subsidies for Polyhouse Farming in India
This is where it gets interesting. Under NHB (National Horticulture Board) and NHM (National Horticulture Mission), the Indian government subsidises polyhouse construction by 50–60% of the project cost — up to ₹700/sqm for fan-pad systems in most states.
Additionally, the Agriculture Infrastructure Fund (AIF) provides low-interest loans (3% interest subvention) for infrastructure like polyhouses.
AgriJoy handles all subsidy paperwork in-house — from NHB/NHM applications to AIF loan processing — so farmers don't have to navigate the government process alone.
Want to know the exact subsidy available in your state? Contact AgriJoy → Consultancy Form
Choosing the wrong crop — not every crop suits your climate or market access
Skipping a site feasibility study — water source, soil drainage, and wind load matter
Underestimating ventilation — poor airflow = humidity = fungal disease
No marketing plan — yield without an offtake buyer is a loss
Going it alone — subsidy claims fail when documentation is wrong
AgriJoy's model addresses all five: site assessment, crop selection, setup, subsidy processing, and market linkage are all part of how we work with farmers.
Why Polyhouse Farming is Growing Fast in India
India's polyhouse area has grown from under 30,000 hectares in 2015 to over 1,00,000 hectares today. Drivers:
Rising demand for pesticide-free, consistent-quality produce from supermarkets and exporters
Government push through NHM, NHB, and AIF
Climate variability making open-field yields unpredictable
Urban consumers paying premium for exotic vegetables year-round
The trend is only accelerating — and farmers who set up polyhouses in the next 3 years will be the ones capturing that premium market first.
Ready to Set Up a Polyhouse?
AgriJoy works with farmers across India — from site selection and structure design to subsidy filing and crop planning. Fill in the form to book a free consultancy call from our expert team: Consultancy Form
great support