Short answer: Prequalify a greenhouse supplier before requesting a final commercial offer. Check legal identity, technical capability, design responsibility, manufacturing control, installation support, after-sales capacity and evidence that can be independently verified. A low price or polished catalog is not enough.
A commercial greenhouse combines structure, covering, climate equipment, irrigation, electrical systems, controls, logistics and construction interfaces. Suppliers may quote different boundaries while using the same project name. Prequalification creates a shortlist of companies that can answer the technical request and clearly state responsibility.
| Check | Evidence to request |
|---|---|
| Legal identity | Registered company name, address, registration details and contracting entity. |
| Bank and payment identity | Account beneficiary matching the contracting entity, verified through a separate channel. |
| Export responsibility | Who issues documents, coordinates shipping and handles destination questions. |
| Insurance and local compliance | Requirements verified by the buyer and qualified local advisers. |
Do not rely on certificates or screenshots without checking the issuer, scope, date and company name. Requirements differ by destination, so the buyer should confirm which documents are legally necessary.
Ask who produces structural calculations, greenhouse layouts, irrigation design, electrical drawings and control sequences. Request a sample document set with confidential details removed. The supplier should explain design criteria, assumptions, exclusions and interfaces that require local engineering. Country experience does not replace site-specific wind, snow, seismic, soil and permitting checks.
Request material specifications, tolerances, coating or galvanizing requirements, covering datasheets, inspection stages, traceability and nonconformance procedures. Clarify which components are manufactured, purchased or subcontracted. A factory visit or independent inspection can verify current capability, but it should use a written checklist instead of general impressions.
Ask the supplier to explain how climate equipment is selected from crop targets and weather data. For irrigation, review water-analysis inputs, hydraulic zones, filtration, dosing, tanks, drainage and sanitation. For automation, request an input-output list, alarm philosophy, manual fallback, remote-access policy and commissioning method. Brand names alone do not prove system integration.
Define whether the supplier provides drawings only, remote guidance, on-site supervision or a full installation team. Ask for assumed local crew size, tools, lifting equipment, utilities, accommodation and buyer responsibilities. Commissioning should include inspections, point tests, interlocks, functional tests, training, records and an open-item list.
Request written warranty scope, exclusions, response route and evidence required for claims. Identify critical spares, recommended consumables, local alternatives and expected replacement process. Check whether software, passwords, licenses, manuals and backups remain usable after handover. Avoid vague promises such as lifetime support without defined response and parts terms.
When references are offered, ask permission to contact them and verify project scope, date and supplier role. Photographs should not be treated as proof of ownership or performance. A supplier may have relevant capability without a project in the buyer's country, but the proposal must still adapt to local conditions.
Legal and payment identity verified independently
Named technical contact and clear design responsibility
Site-specific structural and climate input process
Material, manufacturing and inspection controls documented
Water, irrigation, electrical and automation interfaces understood
Installation, commissioning and training scope stated
Warranty, spare parts and support route written
Commercial exclusions, validity and schedule disclosed
Use weighted scores and mandatory pass-fail items. Record unanswered questions rather than assuming compliance. Only invite qualified suppliers into the detailed tender or quotation stage.
Use enough qualified bidders for comparison while keeping the technical review manageable; capability matters more than a fixed number.
No. Verify legal identity, scope, documents and quality controls; use a visit or independent inspection when risk justifies it.
Not before normalizing scope, specifications, exclusions, service, logistics, life-cycle cost and project risk.
Possibly, if capability is verifiable and the design is checked against the exact site and local requirements.
Continue with the quotation comparison guide, pre-shipment inspection guide and warranty and commissioning checklist.
Send the project site, crop, area, water and utilities through the contact page to prepare a comparable technical request.