How Ozonated Fertigation Improves Crop Growth in Greenhouse Agriculture

Research article posted at the bottom of the page.

If you’re running a greenhouse, you already know how much pressure there is to improve yield, reduce disease, and keep inputs under control. Water quality plays a bigger role in that than most people realize, especially in recirculating systems where small issues can compound quickly.

One area that’s getting more attention, and for good reason, is ozonated fertigation. We’ve seen firsthand how properly applied ozone can improve system performance, but it’s not just field experience driving that conversation. There’s also solid research backing it up.

A greenhouse study on pepper cultivation looked at what happens when controlled levels of ozone are introduced into irrigation water. The results line up closely with what we see in real-world applications.

What the Study Looked At

The study focused on greenhouse-grown pepper plants and evaluated different ozone concentrations in irrigation water. The goal was to measure plant growth, nutrient uptake, and overall root zone performance under each condition.

What They Found (And Why It Matters)

Plants receiving ozonated water showed a clear increase in overall biomass, which is another way of saying they grew faster and more vigorously. That kind of response typically points back to improved root conditions rather than just surface-level changes.

Nutrient uptake also improved, particularly with nitrogen and potassium. When the root zone is cleaner and better oxygenated, plants are simply more efficient at absorbing what’s already being applied. For growers, that can translate into better fertilizer efficiency and more consistent crop performance over time.

Another major factor is dissolved oxygen. As ozone breaks down, it leaves behind oxygen in the water, which supports root respiration and helps prevent anaerobic conditions. In high-demand or recirculating systems, that added oxygen can make a noticeable difference in plant health and stability.

The study also observed increases in leaf area and chlorophyll content, both of which are tied to stronger photosynthesis and overall plant vigor. These aren’t isolated improvements—they’re all connected back to what’s happening below the surface in the root zone.

One important takeaway is that there’s a balance to be maintained. The study identified an optimal ozone range where plants performed best, and pushing beyond that range started to reduce the benefits. That reinforces something we emphasize often: system design and control matter just as much as the technology itself.

What This Means in the Real World

Research like this is valuable because it confirms what many growers are already seeing in practice. When ozone is applied correctly, it can improve plant health, reduce pathogen pressure, increase nutrient efficiency, and support more consistent yields.

The key phrase there is “applied correctly.” Ozone isn’t something you just inject and hope for the best. The effectiveness depends on how it’s integrated into the system, including injection method, contact time, overall water quality, and how the system is monitored and controlled. There are companies that will sell you a machine that produces ozone, but it takes expertise to design a system that actually works, and makes you money. Advanced Treatment Technologies has +25 years of experience of designing and manufacturing effective water treatment solutions, and establishing ourselves as the industry standard.

Where Ozone Fits in a Complete System

Ozone performs best when it’s part of a broader water treatment strategy rather than a standalone solution. In most cases, that includes some combination of filtration, advanced controls, dissolved oxygen management, and system design that supports consistent performance.

For many operations, that also means incorporating features like closed-loop systems and clean-in-place (CIP) functionality to keep irrigation lines clean and ready for use every day. When all of these pieces are working together, the results are not only better, but far more reliable.

Final Thoughts

Ozonated fertigation isn’t just a theory—it’s a practical, proven approach supported by both research and real-world results. For growers looking to improve consistency, reduce risk, and get more out of their systems, it’s a tool worth serious consideration.

As with most things in water treatment, the details matter. Getting the design right is what ultimately determines how much value you get out of it.

Want to Learn More?

If you’re considering ozone for your operation or looking to improve an existing system, we’re always open to having that conversation. Every setup is different, and a good solution starts with understanding the specifics. Visit our website to learn more & request a quote! https://www.advancedtreatmenttechnologies.com/plantagriculture

Effect of Ozonated Fertigation in Pepper Cultivation.pdf

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