Open field vs greenhouse
Open-Field Farming vs Greenhouse Production
Open-field farming vs greenhouse production
Greenhouse production raises yield per hectare, water efficiency and quality consistency at a far higher CAPEX per hectare, while open-field farming stays cheapest to build and most exposed to climate and price volatility. The right choice depends on crop value, climate risk, water cost and offtake requirements.
Frequently asked questions
Five inputs decide almost everything else: crop and growing system, cultivated area and phasing, site climate extremes (temperature, humidity, wind and snow loads), water source and water analysis, and available electrical capacity. Structure type, covering, ventilation, screening, cooling, heating, irrigation, fertigation and automation follow from those inputs. Any of them left blank is filled in by each manufacturer with a different assumption, which is the usual reason two proposals for the 'same' greenhouse cannot be compared.
Structure and covering, foundations and civil works, ventilation, cooling and heating, screens, irrigation, fertigation equipment, water treatment, growing system or substrate, climate control and automation, electrical, energy and backup, packhouse and pre-cooling, then installation, commissioning, training and spare parts. Splitting the project this way exposes the packages a supplier has quietly excluded — civil works, electrical connection and water treatment are the three most often left out of a headline price.
Water quality versus fertilizer solubility, irrigation flow versus dosing capacity, fertigation controller versus climate computer, drain recirculation versus disinfection, greenhouse climate design versus crop assumptions, and imported equipment versus local civil and electrical works. Each sits between two contracts, so it is nobody's scope unless the RFQ names an owner for it.
Indicative planning ranges: net house USD 8–20/m², single-span polytunnel 25–50, multi-span mid-tech 50–120, Venlo glass 150–350, and semi-closed controlled-environment 300–600. Climate severity typically adds 5–35%, site works 15–30% and financing costs 8–15%. These are feasibility figures for budgeting only — binding pricing comes from suppliers once site data and specification are fixed.
When land control, water source and analysis, electrical capacity, crop plan, area, technology tier, budget band and target timeline are all documented, and one written specification exists that every supplier will quote against. Until then a requirement is scoped as 'early concept' or 'needs clarification' and is reviewed manually before anyone is contacted.
One private brief is submitted; a sourcing specialist reviews it manually, identifies the missing information and normalises it into a single written specification; qualified manufacturers, integrators and EPC contractors are approached only after that internal approval; returned offers are normalised to the same scope, lead time and delivery terms so they can be compared line by line. No supplier is contacted automatically and no buyer contact details are released automatically.
Two very different investment profiles. Greenhouses deliver 5–20× the yield per hectare with tight water and climate control, at 20–100× the CAPEX. This is the honest side-by-side.
| Dimension | Open-Field Farming | Greenhouse Production |
|---|---|---|
| CAPEX per hectare | USD 3–15K (irrigated open field) | USD 300K–3M (poly to high-tech glass) |
| OPEX intensity | Low–medium | Medium–high (energy, labour, inputs) |
| Yield uplift | Baseline | 5–20× per hectare for the same crop |
| Water use / kg | High | Very low (fertigation, condensate recovery) |
| Climate risk | High | Low – controlled envelope |
| Labour intensity | Seasonal peaks | Steady, higher skill |
| Export readiness | Depends on cold chain | High – uniform, predictable |
| Best-fit crops | Grains, oilseeds, potato, onion, melon, watermelon, orchards | Tomato, pepper, cucumber, leafy greens, herbs, berries, cut flowers |
| Payback | 3–7 years | 5–10 years (tech-tier dependent) |
Tailored open-field planning guidance
Pick the climate, project scale and target market. The block below returns supplier-neutral recommendations on crop family, envelope, irrigation, fertigation and climate control — ready to feed into an RFQ.
Crop family fit
citrus, olive, table grape, melon, watermelon, tomato for processing
Envelope & protection
Open-field cultivation — no permanent envelope. Consider windbreaks, mulch and shade netting where solar load or wind exposure is high.
Irrigation & water
Drip irrigation with pressure-compensating emitters, disc or screen filtration, and a booster pump sized to peak crop ET.
Fertigation & nutrition
Injector-based fertigation on drip mainlines. Soil sampling and leaf-tissue analysis every 4–6 weeks to tune N-P-K + micronutrients.
Climate control
Weather-driven irrigation scheduling. Frost, hail and heat-wave mitigation via crop insurance, windbreaks and staggered planting windows.
Scale, market & risk
Commercial scale — the sweet spot for structured financing (leasing, working-capital, project finance). Domestic retail buyers usually require food-safety certification, uniform grading and reliable weekly volumes.
Directional guidance for pre-RFQ planning. Site-specific specifications come from qualified suppliers responding to your private RFQ.
Straight answers for project buyers
Short, direct answers to the questions commercial growers, developers and EPC contractors ask before issuing an RFQ. A dedicated sourcing specialist — not an automated form — works through your brief with you.
What type of greenhouse is suitable for my project?
Structure selection follows climate severity, crop value and production window. Tunnels and multi-span plastic houses suit mild climates and lower-value crops; reinforced multi-span structures with active cooling suit hot climates; high-tech glass with screens, heating and climate computer suits cold or high-radiation climates and high-value crops grown year-round. Wind and snow loads set the minimum structural class regardless of crop.
What crops justify a commercial greenhouse investment?
Most commercial protected agriculture projects grow tomatoes, cucumbers, peppers, strawberries, leafy greens, herbs, berries, cut flowers or seedlings. The decision depends on local market price, year-round demand, cold-chain access and export options rather than agronomy alone — the same structure can be economic for one crop and marginal for another in the same country.
What level of automation does a commercial project need?
Below roughly one hectare, semi-automatic irrigation with basic climate control is common. Above that, a climate computer with integrated fertigation is usually justified by labour cost, yield stability and the traceability that buyers and lenders expect. Hydroponic production effectively requires automated dosing regardless of area.
Project scale context
Exact design depends on crop, climate, wind and snow loads, temperature and humidity extremes, water quality, production target, automation level and local infrastructure. The figures below are scale context for scoping an RFQ, not a specification.
| Project size | What typically changes at this scale |
|---|---|
| 1 hectare | Single crop, one climate zone, semi-automatic fertigation. |
| 5 hectares | Multi-zone climate, dedicated fertigation room, packhouse in scope. |
| 10 hectares | High-tech specification, recirculating hydroponics, water treatment. |
| 20+ hectares | Phased build, EPC contracting, on-site energy and logistics. |
RFQ readiness — what suppliers need from you
Quotations are only comparable when every supplier answers the same brief. Have these points ready and the first round of offers arrives on one scope. Anything you do not have yet, a sourcing specialist will work through with you.
- Country and project location (nearest town, altitude, port of entry)
- Greenhouse area in m² or hectares, and whether it is phased
- Crop or crops, and production target (kg/m²/year or stems/m²/year)
- Climate data: minimum and maximum outside temperature, humidity, wind, solar radiation
- Water source, available volume and water analysis (EC, pH, sodium, chloride, bicarbonate)
- Growing method: soil, substrate/hydroponic or a mix
- Required automation level: manual, semi-automatic or fully computer-controlled
- Cooling and heating requirement, and available energy source
- Greenfield site or expansion / retrofit of an existing project
- Indicative budget band and target timeline
Related systems in this project cluster
Commercial projects are specified as one package. These pages cover the systems most often quoted alongside this one.
Turnkey project scope: structure, climate, fertigation and commissioning.
Greenhouse climate control systemsCooling, ventilation, heating, humidity, CO₂ and screens.
Irrigation centerDrip lines, filtration, dosing, pumping and irrigation automation.
Fertigation systemsDosing units, EC/pH control and nutrient injection.
Industrial agricultural pumpsBooster and pumping stations, filtration and reservoir design.
Commercial greenhouse costWhat actually drives greenhouse CAPEX per hectare.