Which covering is best?

It depends on climate, crop light needs, hail or dust risk and budget. Ask suppliers for documented light transmission, lifespan and warranty for your conditions.

Only if your crop window includes periods below the crop's minimum. Your site records and crop requirements answer this, not a general rule.

How tall should the greenhouse be?

Height affects air volume, ventilation and crop work. Your engineer and supplier should justify it for your climate and crop.

Can I start without climate data?

You can start measuring now and use nearby station data with a clear note. Design loads must still follow local codes.

Does good planning guarantee yield?

No. It reduces design risk. Yield depends on crop, variety, climate, water, management and market.

How to plan a greenhouse by climate, crop, market, water and budget: structure, covering and control

Reviewed: 2026-10-13 · SeedMatchGroup

Short answer

Start from the crop and market window you want to supply, then describe the site's climate extremes and water. Those three set the climate envelope the greenhouse must hold. Choose structure, covering and control level to hold that envelope within budget — not the other way round — and confirm every choice with local engineers and the selected supplier.

Agronomist and engineer reviewing greenhouse layout drawings on a dry site at sunrise, with a weather station and well pump — A basis of design starts on site: climate records, water source and the crop calendar.

Many projects start with a structure catalogue. Better projects start with a crop calendar and a site file. This guide turns crop, climate, market, water and budget into a written basis of design that suppliers can price on equal terms.

Step 1 — Crop, variety segment and market window

Write down what you will grow, for which buyers and in which weeks. Requirements differ widely by crop and variety, so record the crop's temperature, humidity and light needs from your seed supplier or agronomist, not from a generic table.

Crop and variety segment
Planting and harvest weeks you must hit
Quality specifications the buyer applies (size, colour, shelf life)
Volume per week

Step 2 — Site climate and risks

Item	Why it matters	Source
Max/min temperatures and their duration	Cooling and heating load	Local weather station records (several years)
Humidity in hot months	Evaporative cooling performance	Same
Solar radiation and day length	Shading, lighting, covering choice	Same
Wind and snow loads	Structural design	National building code, engineer
Hail, dust, salt spray	Covering durability	Local experience, insurer

FAO GAEZ gives a regional suitability picture; it does not replace site measurements.

Step 3 — Water quantity and quality

Estimate seasonal water need from crop evapotranspiration (FAO-56: ETc = Kc × ETo) plus system losses, and compare with the licensed volume. Test the source: pH, EC, alkalinity, sodium, chloride, boron and other ions are interpreted for your crop and system with a local adviser. Poor water may require treatment, which affects budget and layout.

Step 4 — Structure, covering and control: a decision table

Decision	Main drivers	Questions to answer
Structure type and height	Climate, wind/snow load, crop height, budget	Which design loads? Which gutter height for ventilation?
Covering (film, polycarbonate, glass, net)	Light, heat retention, hail/dust, lifespan	Light transmission and replacement interval stated by the maker?
Ventilation and cooling	Hot-season temperatures and humidity	Vent area, fan-and-pad or fogging sized for which design day?
Heating and screens	Cold-season minimums, energy price	Peak load, fuel, screen type?
Control and sensors	Crop sensitivity, labour, data needs	What is logged, alarmed and automated?

There is no universal best choice; a lower-tech structure that holds the envelope can beat an expensive one that the budget cannot operate.

Step 5 — Budget as a range

Build CAPEX and OPEX ranges per option with the CAPEX/OPEX/ROI scenario calculator. Include site works, water treatment, packhouse links and contingency. Compare options on cost per marketable kg for your crop window, not on price per m².

Checklist before you ask for quotes

Crop calendar and quality specification written
Several years of site climate data, or a stated gap
Water analysis and licensed volume
Design loads confirmed by a local engineer
Target climate envelope per season
Budget range and financing assumptions
Acceptance tests you will require

Write the crop calendar, site climate, water and budget first. The right structure, covering and control level follow from them, and suppliers can then quote on the same basis.

Tools and next steps

Frequently asked questions

Which covering is best?: It depends on climate, crop light needs, hail or dust risk and budget. Ask suppliers for documented light transmission, lifespan and warranty for your conditions.
Do I need heating?: Only if your crop window includes periods below the crop's minimum. Your site records and crop requirements answer this, not a general rule.
How tall should the greenhouse be?: Height affects air volume, ventilation and crop work. Your engineer and supplier should justify it for your climate and crop.
Can I start without climate data?: You can start measuring now and use nearby station data with a clear note. Design loads must still follow local codes.
Does good planning guarantee yield?: No. It reduces design risk. Yield depends on crop, variety, climate, water, management and market.

Sources

General planning guidance. Results depend on crop, variety, climate, water, regulation and market; numerical examples are hypothetical. Confirm decisions with qualified local specialists.