Fertigation Systems inject dissolved fertiliser into irrigation water so nutrients reach the root zone with every cycle. Send one request and independent irrigation specialists that may cover your area reply with equipment options and prices.
Send your crop, hectares, system flow and current feeding method to get fertigation quotes.
Get the Best QuoteWhat Fertigation Systems Include
- Stock tanks. Chemical-resistant tanks for each fertiliser solution, with mixers or agitation.
- Injector. A venturi, a water-driven proportional pump or an electric dosing pump.
- Control. Timers, flow meters or a controller with EC and pH sensors that adjusts dosing.
- Acid dosing. An optional line to correct pH and keep drippers clean.
- Safety equipment. Backflow prevention, non-return valves and interlocks so fertiliser never runs back into the water source.
Who It Suits
Growers on drip, subsurface drip or micro irrigation, especially orchards, vineyards, vegetables and greenhouse crops that are fed little and often. It suits pivots too, though overhead application wets leaves and soil between rows.
System Options
- Venturi injector. No moving parts and low cost. Needs a pressure drop and gives less exact dosing as pressure changes.
- Water-driven proportional pump. Doses in proportion to flow without electricity. Suits small to medium blocks.
- Electric dosing pump. Accurate, programmable rates. Can be linked to the irrigation controller.
- Automated EC/pH unit. Several dosing channels with sensors that hold target EC and pH. Used in high-value and greenhouse crops.
Consider how many fertiliser products you mix, how exact the dosing must be and whether the injector will be linked to your automation. Make sure filtration sits downstream of the injection point or is rated for it.
How the Job Runs
- Assessment. The specialist looks at your crop, feeding programme, system flow and headworks layout.
- Design. Injector type, tank sizes, number of channels and safety devices are chosen.
- Quote. You receive an itemised price for equipment and installation.
- Installation. Tanks, injectors, valves and backflow devices are fitted and wired.
- Calibration. Injection rates are measured and EC/pH sensors calibrated before handover.
Fertigation Systems Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Venturi injector | R1,500 - R6,000 |
| Dosing pump | R8,000 - R60,000 |
| Automated EC/pH fertigation unit | R80,000 - R400,000 |
| Complete drip incl filtration, fertigation and installation, per ha | R70,000 - R100,000 |
| Greenhouse drip and fertigation, per m² | R80 - R250 |
Prices JUST UPDATED. Ballpark figures, rounded, excluding VAT unless stated. They are compiled from published South African cost estimates and typical supplier and contractor rates. They are not our prices or quotations, and no contractor is bound by them. Unless a row says otherwise they exclude the water source, power supply and earthworks, so confirm exactly what each quotation includes.
Sources:
- DripMaster Agri - drip irrigation in Southern Africa
- Typical South African supplier and contractor rates
Get prices for your farm rather than a range. Send one request and compare replies.
Get the Best QuoteWhat Affects the Price
- Injector type. A venturi costs a fraction of an automated EC/pH unit.
- Number of channels. Each extra fertiliser or acid line adds a pump, tank and valves.
- Flow rate. Bigger systems need larger injectors and tanks.
- Integration. Linking dosing to controllers and flow meters adds wiring and programming.
- Housing. Bunded, shaded storage for chemicals adds civil work.
Maintenance
Flush the injector and lines with clean water after each fertigation cycle. Check backflow valves, calibrate EC and pH sensors regularly, and replace pump diaphragms and seals as they wear. Keep incompatible fertilisers in separate tanks to avoid precipitates that block drippers.
Fertigation Systems FAQs
Is a venturi good enough?
For small blocks with a simple feeding programme, often yes. Where dosing must be exact or pressure varies, a dosing pump gives better control.
Why is backflow prevention needed?
It stops fertiliser-laden water flowing back into a borehole, dam or municipal supply when the pump stops or pressure drops.
Can I fertigate through a centre pivot?
Yes, with a suitable injector and safety interlocks that stop injection if the pivot or pump stops.
Where should the injector go?
Usually at the headworks, upstream of the final filter, so any undissolved particles are caught before the drippers.
Related Services
Request fertigation quotes through Agricultural Irrigation South Africa and compare the injector type, dosing control and safety devices each specialist includes.
Agricultural Irrigation South Africa is a quote-comparison service. We do not design, supply, install or repair irrigation systems, and we do not employ contractors. Work is quoted and carried out by independent irrigation businesses, and your contract is with the business you choose. Ask each one for a written quotation that names the equipment, design flows and pressures, preparation, timing and any warranty terms before you pay a deposit.
Fertigation Systems. Describe your irrigation job once and compare replies from independent contractors.
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