What Is Fertigation: Complete Guide, Systems & Benefits [2026]

Fertigation is the agricultural technique that combines irrigation and fertilization into a single automated process. Unlike traditional agriculture, where solid fertilizers are spread on the soil and then watered, fertigation injects liquid nutrients directly into the water stream.

This method eliminates nutrient leaching. The roots receive a nutrient solution that is already dissolved and ready for immediate absorption. The fundamental difference lies in precision: traditional irrigation feeds the soil irregularly, while fertigation provides plant-directed feeding, keeping the salinity (EC) and acidity (pH) levels in the substrate perfectly constant.

A fertigation cycle works by drawing water from the primary source, injecting exact proportions of base nutrients and adjusters, and distributing the mixture to the plants.

Here is the standard sequential process of a professional system:

1. Source Water: Raw water enters the system from a municipal supply, well, or collection tank.
2. Nutrient Mixing: Injectors draw concentrated solutions (A, B, C) and mix them into the main water flow.
3. EC/pH Dosing: Sensors read the electrical conductivity (amount of dissolved salts) and pH. A controller regulates the injection of acids or bases to hit the targeted setpoints.
4. Distribution: Pumps push the perfectly balanced nutrient solution toward drippers, micro-sprinklers, or hydroponic reservoirs.
5. Runoff or Recirculation: Excess water is either drained (open-loop systems) or recovered, sterilized, and fed back into the tank (closed-loop systems).

Fertigation systems are divided into three main categories based on their injection and control technology: Venturi systems, mechanical dosing pumps, and automated digital controllers.

• Proportional Dosing (Venturi Injectors): These use water pressure to create a vacuum that sucks in the fertilizer. They are cheap but inaccurate when water network pressure fluctuates.
• Dosing Pumps (Volumetric/Peristaltic): These inject fixed volumes of fertilizer. Peristaltic pumps are the industry standard for extreme precision.
• Automated Digital Systems (Closed-Loop and In-Line): The ultimate evolution. Systems like the NIDO ONE V2 combine peristaltic pumps for 4 independent nutrients and a pH adjuster. They connect to a mobile app, read water parameters in real-time, and correct values every millisecond.

Fertigation provides a direct increase in crop yields combined with a drastic reduction in operating costs. From greenhouse tests monitoring metrics via remote control apps, the efficiency data is unequivocal.

Fertigation is successfully applied in commercial greenhouses, vertical farms, indoor grow rooms, and intensive open-field crops.

It is the backbone of all soilless cultivation techniques (hydroponics, aeroponics) and inert substrate growing (coco coir, rockwool). However, it is also becoming the standard for orchards, vineyards, and open-field vegetables (tomatoes, strawberries), where drip irrigation systems distribute the nutrient solution seamlessly.

Manual fertigation requires physically preparing the nutrient solution by calculating dosages by hand, whereas automated fertigation delegates the calculation, dosing, and monitoring to a computer.

Manual management leads to massive pH and EC fluctuations due to human error or thermal variations, causing plant stress.
Automation eliminates this problem. Using a system like NIDO ONE V2 allows you to:

• Set specific “Recipes” per phenological stage (vegetative growth, blooming) directly from your smartphone.
• Maintain a stable closed-loop environment, analyzing return water and adding only the consumed nutrients.
• Receive push notifications if solution levels in the tanks drop below the threshold.

To properly size and choose a fertigation system, you must evaluate four structural parameters of your facility. Use this technical checklist:

1. Tank Volume: Calculate the total liters of water to manage. A NIDO ONE V2, for instance, easily handles tanks from 10 up to 10,000 liters.
2. Number of Zones / Recipes: If you grow different species simultaneously, you need a system capable of managing multiple solenoid valves with different nutrient recipes.
3. Crop Type and Substrate: DWC (Deep Water Culture) crops require constant pH corrections, making a fast, automated digital system mandatory.
4. Connectivity: Ensure the controller has Wi-Fi and a stable proprietary App for 24/7 monitoring and historical data logging.

How much does a fertigation system cost?
Costs range from 50 € for a simple amateur Venturi injector to over 15,000 € for industrial controllers. Advanced, plug-and-play professional systems for greenhouses and indoor setups, like the NIDO ONE V2, sit in an accessible price range (under 1,500 €), breaking down the barriers to entry for automation.

What is the difference between fertigation and drip irrigation?
Drip irrigation is the physical method of distributing water through pipes and emitters. Fertigation is the process of dissolving nutrients into that water. Drip irrigation is the vehicle; fertigation is the fuel.

Can I use organic fertilizers in fertigation?
Yes, but with extreme caution. Organic fertilizers tend to be thick and rich in biological particulate matter that can clog drippers and pumps. It is preferable to use micro-filtered organo-mineral fertilizers or pure mineral solutions specifically formulated for automated systems and hydroponics.

How do I control EC and pH in fertigation?
In the manual method, you use digital pen meters, dipping them into the tank and correcting by hand with acids or salts. In modern systems, industrial probes constantly submerged in the solution read the values in real-time and communicate with a motherboard that triggers micro-pumps to inject exact doses of adjusters.