Before You Buy Steel: What a Hydroponic Feasibility Study Should Tell You

Most hydroponic farms that fail did not fail in the tunnel. They failed on a spreadsheet that was never written. A feasibility study is cheap relative to a structure, and it is the only stage where changing your mind costs nothing.

Here is what a proper study must tell you before you commit capital.

1. The market, before the crop

Not "there is demand for lettuce". Who specifically buys, in what volume, at what price, how often, and on what payment terms? A named buyer with a stated weekly volume changes the entire design. Without one, you are growing on hope.

This is the number one reason projects underperform: growers build capacity first and go looking for buyers afterwards, then discover the price they assumed was retail shelf price, not the price a wholesaler pays.

2. Water — quantity and chemistry

Litres per day available, reliably, in the driest month. Then a full analysis: EC, pH, sodium, chloride, bicarbonate, calcium, magnesium, iron, and microbiological load. Water chemistry determines the nutrient recipe, whether recirculation is viable, and whether you need treatment. It can also, occasionally, tell you not to build on that site.

3. Climate at your exact site

Not the provincial average. Summer maximums, winter minimums, frost dates, humidity, hail risk and prevailing wind direction and speed. These decide ventilation, cooling, heating, wind rating and crop calendar.

4. Crop programme and realistic yield

Cycle length, plant density, expected yield per square metre and the wastage assumption. Use conservative yields for year one — a first-time grower does not hit textbook numbers in the first two cycles, and any model that assumes otherwise is fiction.

5. Full capital cost, including the unglamorous parts

Structure, cover, growing system, water storage, pump, filtration, dosing, electrical connection, site preparation, fencing, packhouse or cold storage, and delivery. Plus a contingency. Studies that omit site preparation and cold chain are the ones that blow their budget.

6. Operating cost per cycle

Seedlings, nutrients, electricity, labour, packaging, transport to market, cover amortisation, maintenance. Expressed per cycle and per kilogram or per head, so you can compare directly against your selling price.

7. Working capital to first revenue

The gap between planting and being paid. For leafy greens that might be eight to twelve weeks including payment terms; for fruiting crops it can be four to six months. Running out of cash here kills otherwise sound farms.

8. Labour and skills plan

Who grows? A hydroponic farm needs someone technically competent on EC, pH, nutrition and disease every single day. If that person does not exist yet, training is part of the project plan and part of the timeline — not something to sort out after commissioning.

9. Sensitivity analysis

What happens to the return if price drops 20%, yield comes in 15% under, or electricity doubles? A model that only works under best-case assumptions is telling you the project is fragile.

What good output looks like

A feasibility study should end with a clear number — capital required, expected annual net margin, payback period — and an honest statement of the two or three things that most threaten it. If a study only gives you good news, it was not a study.

When to walk away

Sometimes the right output is "not this site" or "not this crop" or "not at this scale yet". We have told clients exactly that. It is a far cheaper conversation than the one that happens eighteen months later.

We run feasibility studies, farm designs and audits of existing operations across South Africa and the region. If you are weighing up a project, start here rather than with a steel quote.