Polyhouse Vegetable Farming Farming in India 2026
Grow high value vegetables year round inside a controlled greenhouse
Overview
A polyhouse is a greenhouse covered with a special UV stabilised polythene film inside which you can partly control temperature, humidity and light. Because the crop is protected from rain, wind, frost and many pests, you can grow high value vegetables such as coloured capsicum, cucumber, tomato and exotic greens almost all year and get cleaner, more uniform produce than open fields. Polyhouses come in naturally ventilated and fan and pad cooled types, and most Indian vegetable farmers use the naturally ventilated kind because it costs less to run. The system needs drip irrigation, fertigation and steady management. It is a real business that rewards skill and discipline more than luck, and it carries higher capital cost and crop risk than open farming. With good agronomy, a polyhouse can lift yields and prices enough to repay the structure over a few years, but poor management can wipe out a whole crop fast.
Climate
A polyhouse itself moderates climate, so it works near almost any city. Naturally ventilated polyhouses suit most of plains India for capsicum, cucumber and tomato. In very hot regions you may need extra shading, fogging or fan and pad cooling, while in cold hill areas a polyhouse extends the season and protects against frost. Site it in an open, sunny spot with assured water and power.
Soil
Most polyhouse vegetables are grown in raised soil beds enriched with well rotted compost, or in soilless media like cocopeat for some crops. The growing soil must be well drained, sterilised or solarised before planting, and slightly acidic to neutral. Drip lines and fertigation deliver water and nutrients precisely. Get the soil tested and add gypsum or organic matter as advised to avoid salt build up over repeated crops.
Planting & Spacing
Set up the polyhouse with drip and fertigation first, then transplant healthy nursery seedlings into raised beds at the spacing each crop needs. The most profitable polyhouse crops in India are coloured and green capsicum, parthenocarpic cucumber, hybrid tomato, and high value items like cherry tomato, lettuce and exotic herbs. Many farmers run two to three crop cycles a year. Train and trellis vining crops vertically, prune regularly and keep strict entry hygiene to protect the closed crop.
Varieties
Two main structure types exist. Naturally ventilated polyhouses use roof vents and side curtains and are cheaper to build and run, suiting most of India. Fan and pad or climate controlled polyhouses give tighter control for high end or hot climate growing but cost much more. Low cost or low tunnel structures are a cheaper entry point. Within these, choose hybrid seed bred for protected cultivation rather than open field varieties.
Care & Management
Polyhouse success depends on daily skilled management. You must control ventilation, humidity and temperature, run a precise fertigation schedule, train and prune plants, and watch the crop closely. Maintain the polythene film, repair tears, keep insect nets intact at vents and follow strict hygiene at the entry. This is knowledge intensive work, so training and a mentor or good consultant make a big difference, especially in the first year.
Pests & Diseases
A closed structure keeps out many pests but if a pest does get in it can spread fast. Watch for whitefly, thrips, mites, aphids and leaf miner, and for fungal and bacterial diseases that thrive in high humidity. Use insect proof nets at vents, sticky traps, biocontrol and good sanitation, and ventilate to cut humidity. Root knot nematode and soil borne wilt can build up over repeated crops, so rotate or use grafted plants and soil treatment.
Yield & Harvest
Protected vegetables usually yield several times more per unit area than open field crops, and the produce is cleaner, more uniform and graded for premium markets. For example coloured capsicum and parthenocarpic cucumber can give much higher marketable yield and better prices than open cultivation. Actual gains depend heavily on crop, variety and management. The longer growing window and off season supply often matter as much as raw yield for profit.
Cost & Profit
Building a naturally ventilated polyhouse in India costs very roughly 800 to 1500 rupees per square metre, so a small 1000 square metre unit can run from a few lakh to over ten lakh rupees plus drip, planting and running costs. Fan and pad systems cost much more. Returns can be attractive for well managed high value crops, with payback often quoted at three to five years, but this depends entirely on yield, prices and skill. Polyhouse farming has a real failure risk for beginners. Treat all figures as rough indications only, build a proper budget for your crop and market, and do not bet money you cannot afford to lose.
These are indicative ranges. Actual cost and income vary by region, market and management, so verify locally.
Market & Demand
Polyhouse produce targets premium and steady demand channels such as supermarkets, hotels, restaurants, organised retail and online grocery, plus city mandis for off season supply. Coloured capsicum, seedless cucumber and quality tomato fetch better, more stable prices than open field produce. Tie up buyers before you scale, since premium markets reward consistent quality and reliable supply rather than one off lots.
Subsidy & Support
Polyhouses are supported under the Mission for Integrated Development of Horticulture (MIDH) and the National Horticulture Board (NHB) for protected cultivation. Assistance is broadly around 50 percent of the admissible cost for naturally ventilated and similar structures, subject to government cost norms, area limits and a per project ceiling that has been quoted at up to about 56 lakh rupees in some schemes. Many states add their own top up. Rates, norms and ceilings change, so confirm the current MIDH and NHB guidelines and apply through your state horticulture department or NHB before building.
Where to grow it in India
Frequently asked questions
How much does a polyhouse cost in India
What is the best crop for a polyhouse
Is polyhouse farming profitable for a beginner
How much subsidy is available for a polyhouse
How many crops can I grow in a polyhouse in a year
Want help to start or connect with farmers growing this?
Ask the community Join the Sangh