The Importance of Water Sanitation in Greenhouse Production
May 14, 2026 In greenhouse production, water quality affects the effectiveness of available nutrients, fertilizer performance, and irrigation systems. And as Plant-Prod discusses in a recent article, when water is not properly treated (i.e., sanitized), it can lead to the distribution of plant pathogens (such as pythium and phytophthora), the inhibition of nutrient delivery, and the creation of clogs in equipment lines and pipes, all of which can in turn lead to non-uniform, damaged, or dead crops.
So, how can growers keep their water clean?
Common Water Sanitation Methods
The best water sanitation method depends on the type of operation, production needs, and available resources. Plant-Prod suggests several options:
Oxidizing Agents:
Oxidizing agents disinfect water by reacting with organic material and pathogens, but their effectiveness depends on several factors (e.g., concentration, contact time, water quality). They work best when paired with filtration to reduce the amount of organic matter present in the water.
Ultraviolet (UV) Radiation:
UV treatments work by disrupting the DNA of pathogens, but require clear water, as debris, particulates, and other matter in the water can block UV light.
Ozone:
A type of oxidizing agent, ozone is highly effective at eliminating contaminants, but its performance can be influenced heavily by other factors (e.g., foreign matter, water pH and EC, fertilizers), and its systems are very expensive, making them a better fit for sites with higher operating costs.
Copper Ionization:
Copper ions are released to suppress plant pathogens, but water pH and EC levels must be managed carefully to avoid phytotoxicity, leading to plant damage or death.
Filtration Systems:
Filtration systems are often used before other methods of water treatment to remove solids and organic matter from the supply.
For additional information on water sanitation in greenhouse production, including a look at water chemistry factors and fertilizer compatibility when paired with water treatment methods, please read the original article on the Plant-Prod website.
Subscribe to eNewsletter
