Pillar guide
Commercial vegetable greenhouse planning: crop, system and seed decisions
A vegetable greenhouse is not bought as a structure and then planted. The crop, the variety type and the market specification decide the climate level, the irrigation design and the labour model — and those decide what the structure has to do.
This guide sets the order of the decisions so that structure, climate, irrigation and seed are specified as one project, and so that every supplier quotes the same scope.
How is a commercial vegetable greenhouse specified?
Start from the crop and the market specification, then the climate gap between your site and that crop's requirement in the hardest month of the year. The gap defines the technology level: ventilation only, mid-tech with screens and fertigation, or high-tech with active cooling, heating and climate control. Structure, irrigation, fertigation and seed variety are then specified against that single climate target, and the RFQ states the target rather than a shopping list of equipment.
- Crop and market specification come first; structure and climate follow from them.
- The hardest month of the year sizes the climate system, not the annual average.
- Variety type (indeterminate greenhouse hybrids versus open-field types) changes crop cycle, trellising, labour and climate requirements.
- Irrigation and fertigation are part of the greenhouse scope, not a later purchase.
- Water quality is a design input: it affects filtration, dosing and the substrate decision.
- Commercial projects reviewed by SeedMatchGroup typically start from USD 250K.
1. Crop and market specification decide everything downstream
Tomato, pepper, cucumber, leafy crops and melons impose different crop heights, cycle lengths, climate targets and labour profiles. A long-cycle indeterminate tomato crop in a 6 m gutter house and a short-cycle leafy programme in a low tunnel are different businesses that happen to share the word greenhouse.
Write the market specification first: fruit size and grade, shelf life, packaging, delivery window and whether the buyer is retail, wholesale, export or processing. That specification constrains variety choice, and variety choice constrains the climate and trellising the structure must support.
- Define the crop, the grade specification and the delivery calendar before sizing anything.
- Check whether the market demands continuity of supply — that usually forces a higher climate level.
- Decide single-crop or rotation; rotation changes the climate and irrigation flexibility you need.
2. Variety type and the seed programme
Greenhouse vegetable varieties are bred for controlled environments: indeterminate growth habit, fruit set under low light, uniformity over a long cycle and a disease resistance package matched to local pressure. Open-field varieties placed in a greenhouse usually underperform, and greenhouse varieties in an open field are an expensive mistake.
The seed programme is specified with the same discipline as the structure: crop, variety or hybrid, rootstock where grafting is used, germination and purity, seed treatment, certification and phytosanitary requirements, packaging unit and delivery window against the sowing date.
- Match the resistance package to the disease pressure recorded at your site, not to a generic list.
- Confirm variety registration and import rules in the destination country before an RFQ is issued.
- Fix the sowing date first and work backwards to the seed delivery deadline.
- Compare seed offers on the same seed count or weight, treatment and Incoterm basis.
3. Structure, covering and gutter height
Gutter height governs the air buffer, and the air buffer governs how stable the climate is in extreme weather. Long-cycle fruiting vegetables generally need more height than short-cycle leafy crops, and that height changes steel weight, wind bracing and cost.
Covering choice — polyethylene film, polycarbonate or glass — is a trade-off between light transmission, lifetime, hail and wind exposure, and replacement logistics at your location.
- Design loads (wind, snow, seismic) belong in the RFQ; they change the steel specification materially.
- Insect netting specification follows the local pest pressure and affects ventilation capacity.
- Plan for covering replacement cost and access from the first day, not after year five.
4. Climate level: how much control the crop actually justifies
The climate system is sized by the gap between the crop's requirement and your site's conditions in the hardest month. In hot arid regions, cooling and shading usually dominate; in cold continental climates, heating and screens dominate; in humid tropics, dehumidification and disease management dominate.
Every level of added control is an operating cost and a skill requirement. Buying more automation than the team can run produces worse results than a simpler house operated well.
- State climate targets (temperature, humidity, ventilation capacity) in the RFQ, not equipment brand names.
- Check power availability and reliability before specifying active cooling or supplementary lighting.
- Include the control system, sensors and alarms in the same scope as the hardware.
5. Irrigation, fertigation and water
A full water analysis is the cheapest de-risking step in the entire project. It determines filtration, whether treatment is needed, the fertigation recipe base and whether substrate production is preferable to soil.
Fertigation scope covers dosing units, EC and pH control, mixing tanks, distribution uniformity and drainage or recirculation handling. Recirculation lowers water and fertiliser use but raises the disinfection and monitoring requirement.
- Commission a full water analysis before the RFQ, including sodium, chloride, bicarbonate and boron.
- Specify emission uniformity, not just dripper type.
- Decide drain-to-waste or recirculation early — it changes the hydraulic design.
6. Labour, crop work and the operating model
Protected vegetable production is labour intensive: trellising, pruning, pollination, scouting, harvest and packout. The labour model is part of the feasibility, and it changes with crop and variety type.
Decide who runs the crop before the structure is ordered: an experienced head grower, an agronomy support agreement, or a training programme built into the supply contract.
- Include training, commissioning and the first crop cycle support in the RFQ scope.
- Plan pollination (bumblebees or manual) at design stage — it affects the insect screening strategy.
- Size the packhouse and cold chain with the greenhouse, not afterwards.
Before you request quotes
A vegetable greenhouse RFQ is comparable only when these are fixed.
- Crop, market specification and delivery calendar
- Target covered area, phasing and commissioning date
- Site location, altitude and design loads
- Water analysis and water source reliability
- Power availability and backup requirement
- Climate targets for the hardest month
- Production system: soil, substrate or hydroponic
- Variety type and seed programme requirement
- Irrigation, fertigation and drainage scope
- Who handles civil works, erection, training and after-sales
- Budget band and funding route (USD 250K upwards)
Technology level against crop and climate
An orientation table for the level of control a vegetable programme typically requires. Site conditions override it.
| Level | Typical crops | Climate control | Operating demand | Typical fit |
|---|---|---|---|---|
| Net house / shade house | Leafy crops, peppers in mild climates | Shading and pest exclusion only | Low | Mild climates, pest pressure is the main problem |
| Single-span tunnel | Seasonal tomato, cucumber, leafy | Natural ventilation | Low | Season extension, first commercial step |
| Multi-span mid-tech | Tomato, pepper, cucumber | Roof vents, screens, fertigation, basic controller | Medium | Most commercial year-round programmes |
| High-tech glass or semi-closed | Long-cycle indeterminate fruiting crops | Active cooling, heating, screens, climate computer | High | Export specification, harsh climates, continuity of supply |
| Fully controlled / vertical | Leafy and herbs | Full environmental control, artificial light | Very high | Urban or extreme climates, premium short-cycle crops |
Planning tools for this decision
Use the greenhouse project planner to fix crop, climate, size and water before requesting prices, and the quote calculator for a budgetary cost range per m² by technology level.
The seed and fertigation calculators size the input side of the same project so the RFQ covers the whole programme rather than only the structure.
How sourcing works after planning
SeedMatchGroup is a human-led sourcing platform. There is no automatic marketplace and no direct supplier contact.
- 1You submit the project requirement with the planning answers above.
- 2A sourcing specialist reviews the brief and confirms what is missing.
- 3Qualified suppliers are approached privately, without exposing your identity or theirs.
- 4Quotes are normalised onto the same scope, Incoterm and delivery basis for comparison.
Hard stops — do not proceed without these
Each of these has ended otherwise-sound vegetable greenhouse projects.
- No confirmed water quantity and quality for peak demand
- No reliable power for the specified climate system
- No market agreement or credible route to market for the planned volume
- No experienced grower or agronomy support arrangement
- No confirmation that the intended varieties may legally be imported and grown
What this guide does not do
- It does not quote prices, yields or payback figures.
- It does not name suppliers or breeding houses.
- SeedMatchGroup does not manufacture equipment, produce seed or hold stock.
- SeedMatchGroup is not a lender; any financing is subject to third-party approval.
Regional notes
The same crop demands a different technology level in different regions.
- Gulf and hot arid regions
- Cooling, water treatment and shading dominate the design; water source reliability is usually the binding constraint.
- Mediterranean basin
- Mid-tech multi-span with screens and fertigation covers most year-round vegetable programmes.
- Sub-Saharan Africa
- Pest exclusion, ventilation, water storage and grower training carry more weight than automation.
- Latin America highlands
- Light quality, night temperatures and hail protection drive the structure and covering choice.
- Central Asia and cold continental
- Snow loads, heating capacity and thermal screens dominate CAPEX and OPEX alike.
Country-specific planning pages cover local sourcing, installation and financing considerations in more detail.
Who this guide is for
Written for buyers specifying a commercial vegetable production project, not for home or hobby growing.
- Commercial growers expanding or modernising protected vegetable production
- Agribusinesses and food companies securing year-round supply
- Agricultural investors and development projects assessing protected horticulture
- Government and institutional food-security programmes
- Consultants and EPC advisors preparing a client specification
What this guide covers
The decisions that have to be fixed before pricing is meaningful.
- Crop and market specification
- Variety type and seed programme
- Structure and covering choice
- Climate level and control strategy
- Irrigation, fertigation and water treatment
- Substrate versus soil production
- Labour, trellising and crop work
- RFQ content and quote comparison
Vegetable greenhouse questions
Ready to specify the project?
Send the crop, area, location and climate targets. A sourcing specialist reviews the brief and comes back with what is still missing before suppliers are approached.
Commercial projects from USD 250K are reviewed by a dedicated specialist.
Planning guidance only. SeedMatchGroup is supplier-neutral, does not manufacture or sell equipment or seed, and is not a lender; financing is subject to third-party approval.