How Ozonated Fertigation Improves Crop Growth in Greenhouse Agriculture

If you run a greenhouse, you already feel the pressure to push yield, hold off disease, and keep inputs under control. Water quality drives more of that than most growers expect, especially in recirculating systems where a small problem compounds fast.

Ozonated fertigation is getting more attention, and for good reason. We have seen what properly applied ozone does for system performance in the field, and there is solid research behind it. A greenhouse study on pepper plants tested controlled levels of ozone in irrigation water, and the findings line up closely with what we see on real sites.

What the study looked at

Researchers grew greenhouse pepper plants under different ozone concentrations in the irrigation water, then measured plant growth, nutrient uptake, and how the root zone performed under each condition.

What they found

Plants on ozonated water put on more biomass. In plain terms, they grew faster and stronger, and that kind of response usually traces back to healthier roots rather than anything happening at the surface.

Nutrient uptake improved too, especially nitrogen and potassium. When the root zone is cleaner and better oxygenated, plants absorb what you are already feeding them more efficiently. For a grower that shows up as better fertilizer efficiency and more consistent crops.

Dissolved oxygen is a big part of the story. As ozone breaks down it leaves oxygen behind in the water, which supports root respiration and helps keep anaerobic conditions from setting in. In high-demand or recirculating systems, that extra oxygen makes a real difference in plant health and stability.

The study also saw more leaf area and higher chlorophyll, both tied to stronger photosynthesis. None of these gains stand alone. They all connect back to what is happening below the surface in the root zone.

There is a balance to hold. The study found an optimal ozone range where plants did best, and pushing past it started to erase the benefit. Design and control matter as much as the technology.

What it means in the real world

Research like this is useful because it confirms what a lot of growers already see. Applied correctly, ozone improves plant health, eases pathogen pressure, raises nutrient efficiency, and supports steadier yields.

Applied correctly is the key phrase. Ozone is not something you inject and hope for the best. Results depend on how it is built into the system: injection method, contact time, overall water quality, and how the system is monitored. Plenty of companies will sell you a machine that makes ozone. It takes real expertise to design one that works and pays for itself. Advanced Treatment Technologies has more than 25 years designing and building water treatment systems, and that experience is what makes the difference.

Where ozone fits in a complete system

Ozone does its best work as part of a broader strategy, not a bolt-on. In most cases that means some mix of filtration, advanced controls, dissolved oxygen management, and a system designed for consistent performance. For many operations it also means closed-loop and clean-in-place features that keep irrigation lines clean and ready every day. When those pieces work together, the results are better and far more reliable.

The bottom line

Ozonated fertigation is not a theory. It is a practical, proven approach backed by both research and field results. If you are trying to improve consistency, lower risk, and get more out of your system, it is worth a serious look. As with most things in water treatment, the details decide how much value you actually get.

If you are weighing ozone for your operation, we are always happy to talk it through. Every setup is different, and a good solution starts with the specifics. Learn more about our plant agriculture solutions.